What are these events? is that people I have to talk to or something else?

@Marciosmg

Here are what each PW WT and PB WT do to all of the worlds events ;)

http://demonssouls.wikidot.com/world-tendency

White World Tendency decreases enemy HP, damage, exp, and drop (worse upgrade stones), but offers more healing items.
I strongly suggest dying in another world(actually committing suicide in the Nexus is best, since WT there doesn't matter) and entering in spirit form for anything Pure White World required. Dying will make it very difficult to get back to pure white (only really matters for world 5, where Selen and BP Garl disappear)
1-1

* The door on the left near the starting point will be unlocked. (Pure White World Tendency) (Once unlocked, stay unlocked even if World Tendency changes later)
o Pick up the set of Brushwood armor at the bottom of the pit. You need to be able to carry 50 or so in order to pick it up.
+ Brushwood Helmet, Wt 6.9
+ Brushwood Armor, Wt 17.3
+ Brushwood Manifer, Wt 10.4
+ Brushwood Leggings, Wt 10.4
+ Large Brushwood Shield, Wt 13.0
+ Total: Wt 58.0
o In the same pit, on one of the beams is a colorless demon soul, don't miss it! To reach there, look for a broken beam near the top, walk carefully into the gap, if you direction is straight, you will land on the beam below. You can get down by carefully dropping to a lower beam; you should line the jump up from the central beam.
o It is recommended that you pick up the items in White World Tendency if you want to avoid the fight with Miralda.
* Body Form Miralda in Body Form, hiding on the right inside stairwell building. (Pure White World Tendency)
o Drop Binded set & Master's Ring.
o Note: If you killed her, your World Tendency will get a -3.
* The Red and Blue dragon disappear. You can grab the goodies in the field in front of their usual nesting place.
* This also mean that there will be no Red Dragon breathing fire at you while you try to cross over to access the lever.

2-2

* Wanderer Scirvir, show him Dragon Bone Smasher from 2-3 for a Pure Greystone. (Pure White World Tendency)
o To find him, take the right path from the 3 explosive carts. Jump down very carefully, eventually you will find Scirvir beside 2 Crystal Geckos. He can be done as Pure Black and Pure White in the same play through.

2-3

* The debris to the left path will be cleared, you will get an unique extra large sword, Keel Smasher (Pure White World Tendency)

3-1

* 2F West NPC, Rydell can be rescued if you have the key (see 3-2 below). The reward is Dull Rat's Ring. Rescuing Rydell has zero effect on his BP form(remember that Latria's Archstone will be darker due to its position at the back of the screen, so suicide in body form one more time to ensure Pure Black when going for his BP form).
* Nearby, previously blocked path by debris is accessible now (Pure White World Tendency) (Once unlocked, stays unlocked even if World Tendency change later).
o Items found in the cells Prison of Hope, 2F W
+ Three-Corned Hat
+ Venerable Sage's Hood
+ Venerable Sage's Robe
+ Venerable Sage's Gloves
+ Venerable Sage's Boots
* Prison of Hope, 2F East is accessible now (Pure White World Tendency)
o The Prison of Hope, 2F East Cell Key is located in one of the open cell.
o Items found in the cells Prison of Hope, 2F E
+ Paring Dagger (Parrying Dagger in the NA version),
+ Rogue's Clothes
+ Rogue's Gloves
+ Rogue's Boots
+ Chunk of Mercury Stone
+ Chunk of Mercury Stone

3-2

* On top of the first tower where the first chain is released, there will be a bridge leading upwards to the Prison of Hope, 2F W. Cell Key. (Pure White World Tendency)
* EDIT - Bridge ALSO appears during Pure Black world tendency (Confirmed: 12-10-2009) (Confirmed it does NOT appear: 12-12-09)
* * Remark: Once unlocked, this bridge will remain there forever even if World Tendency changes later.

4-1

* Satsuki in human form appears at the entrance looking for Magic Sword "Makoto".
* If you find the Magic Sword "Makoto" and give it to Satsuki, he will attack you. After you've killed him, he will drop the sword for you to pick up.
* If you find the Magic Sword "Makoto" and decided not to give it to Satsuki, he will attack you.

4-2

* In the room Patches kicked you down, the inaccessible corpse is now on the ground. You can pick up the Magic Sword "Makoto".

5-1

* Between the rats, and the first giant goblin, there will be a ladder leading upwards on the face of the wall to the left. (Pure White World Tendency).
o Once this ladder is unlocked, it stay unlocked forever in the current game even if World Tendency changes later.
o Climb the ladder and watch out for a giant goblin half way through.
o Eventually the path leads to three giant goblins guarding the Istarelle spear.

5-2

* Selen Vinland will appear on a tiny island right after the first fog, talk to her to start a side quest. (Pure White World Tendency)
o Give her the Crest of Vinland to get the Ring of Devout Prayer.

5-3

* Black Phantom Garl Vinland. (Pure White World Tendency)
o Only appears after you have killed Maiden Astraea and collected her Pureblood Demon's Soul.
o Drops Brand and Crest of Vinland.

Jesus! O_o

This game is too complicated, lol.

Im too early in the game to try any of it, except for 1-1. And apparently dying in Body form make you lose -3.

How do I gain White tendency other than beating bosses?

I know, the list is very complex and long, and those are just the Pure White events xD

There's other ways to affect the Worlds Tendencies, here is a list on each of them:

http://www.atlus.com/mediawiki/index.php/Tendency

I'm sorry to be posting links, but as you can see there is just too much things to go into smaller detail xD

I saw this link. Its mostly bosses and defeating enemy players. Which mean Im screwed, since I know Im gonna die in Body Form a lot, lol.

@marciosmg

Well, you don't have to worry about that. You can suicide in the Nexus and play the worlds in Soul Form. That way you won't have to worry about messing up WT, since Nexus doesn't count for them.

I have only the false king left standing. He'll die today

I killed yesterday the Maneaters alone and 10 mins later the old monk was falling into the ground too. The feeling of satisfaction i have is unbelievable. Before I beat the game first time I'll farm a million souls to lvl up my endurance and go to get "the blind", Pure black FTW!!.

Then NG+ is next

@Cthulhu

Are you a Pure Black Character Tendency player?

Good Luck on NG+ then :P

I beat the armor spider on 2-1.

Damn that fire attack. I wasted like 90% of my healing herbs .

And died 3 times. Finally I found a corner where the only attck that hit was the fire one. So I kept spamming Soul Arrow.

Man. I was so scared in the end, thinking: Please dont do the fire attack! Please dont do the fire attack! Please dont do the fire attack! lol

Now I got a steel shield.

Should I tackle 1-2 now or 3-1?

@marciosmg

You should tackle 4-1 first, mind the black skeletons, they are the toughest enemies in there, plus you'll see a familiar enemy in that area xD