Where can i download minecraft for free full version?

You probably can't and if you manage to mojang will delete your account just save up for it

You can download it on minecraft's website, but it doesn't matter where you get it from you have to buy a digital copy to play the game since it logs you in whether you're playing online or not.

Nowhere. Mojang locks down the game by requiring you to log in before getting the files.

It's a cheap game. If you like it, keep the people who made it in business and buy the f*ing game.