No, the light force is not the Triforce of Wisdom. As PH explains, Force is the magical life-energy that exists within every living being - the light force is merely a large collection of Force, created by the Minish. Hence why both Vaati and Bellum are able to draw power not just from Zelda, but from everyone in the world. However, the fact that Tetra is singled out in PH is a direct reference to TMC and the light force, thereby establishing a connection between the games. If you can't see that, I'm sorry, but that's just the way it is.
and no..PicoriBlade was made..kind of having the use of Master Sword
then when you fix it it's the White Sword (like in LoZ)
AFTER you fuse White Sword with the elemtns THEN it's the Four Sword
What? The Picori Blade was crafted by the Minish for the Hero of Men. That's your origin right there - and just because it's blue doesn't mean it's the Master Sword. Then the White Sword was created when the blade was restored and re-christened by Master Melari, and finally the Four Sword was born when it was fused with the elements and the sword assumed it's true form.
Honestly, I don't see the problem.
