Buy the stuff that has Nintendo logo on it. ive heard its good shite

Unless you like the 3rd party games alot on wiiu, I wouldnt bother until MK8 and SSB is out. I have SMB & SMB3dW with nothing until DK comes out. They are great titles dont get me wrong, but if anything a price cut is coming and it will be cheaper with more games later.

As someone mentioned before, I also recommend to go in reverse order, get a Wii U first and the PS4 later, right now there are very few exclusive games for the PS4 and those will come later, and you never know maybe you can catch a good promotion when the hype dies a little bit.

Answering your other questions... Yes the Wii U is backwards compatible, so you have a big selection of games to choose from and at a very low price.

Wii U Recommendations:

-Super Mario 3D World

-Pikmin 3

-Rayman Legends

-The Wonderful 101

-Wind Waker HD

-Need for Speed Most Wanted (if you have not played it in other console)

-Batman: Arkham City Armored Edition (if you have not played it in other console)

-Deus Ex: Human Revolution Director's Cut (if you have not played it in other console)

There are more, but without knowing your tastes, those are the only ones that I can recommend blindly.

Get Sonic Lost World unless you're a wimp

Some system features to look forward to:

-The controller can control your TV, Cable/Satellite box, too.
-TVii (in the US, at least) lets you chat with people while watching your favorite shows. It even gives you stats, trivia, play by play, polls, etc. It's fun with the right crowd.
-Web browser is super fast and intuitive and full featured. Virtually no compromises. You can browse while pausing your game, too. Great if you need youtube to help younwith that tricky level or something.
-You can watch a youtube video on TV while continuing to browse on the pad
-Online is still free. Not up to PSN or XBL standards but if you just want someone to play with, it gets the job done.
-Miiverse is awesome. Imagine Twitter for video gamers. Lots of kids there, though. Behave yourself! You can post pics of your gaming Achievements.
-Off TV play so you can play your game while watching TV or whatever. Hell, you won't even need a TV most of the time unless it's something like Nintendo Land.
-Netflix works off screen too and is probably the best Netflix app I've experienced. Better than PS3, X360 (with Kinect), Vita, 3DS, PC, Android, and my TV's stand alone Netflix app, at least. It's had issues before, though. There was a whole week where it didn't work at all.

enjoy!

get deus ex human revolution and mass efect 3. COD ghost is good fps with lots of fun online, get mario 3d world and zelda WWHD, Pikmin 3 and W101, get Batman armored core edtition and batman arkham origins damn get a lot of indie games like trine 2 or little inferno, get all the street figther colection from the VC damn WiiU is a lot of fun so much games so much fun.

Super Mario 3D World
Pikmin 3
ZombiU
Deus Ex: Human Revolution DC
Wind Waker HD
Splinter Cell Blacklist
Nintendo Land
The Wonderful 101
Monster Hunter 3 Ultimate
Tekken Tag Tournament 2 Wii U Edition

Trine 2
Zen Pinball 2
Cloudberry Kingdom
Nano Assault Neo
Knytt Underground
Rush
Edge
Wii Sports Club
Runner 2
NES Remix

EarthBound
Super Metroid
Super Punch Out
Super CastleVania IV
Super Ghouls N Ghosts
Mega Man X
Contra III
Legend of the Mystical Ninja
Kirby Super Star
Kirby's Dream Course

You must get Wonderful 101 - sure it is a little rough around the edges, but it is insanely fun

Get EarthBound on the eShop.

Mario 3D World, Rayman Legends, Wonderful 101 at retail.

And a bunch of great Wii games, as the Wii U is backwards compatible.

Me too, but, at the end of the year, and a PS4 at the end of the next year, unless Sony Brazil drop the price to one thousand dollars, then, I will buy it this hollyday.