look it up on google(How To Tint Your Own Car Windows | DoItYourself.com), if you want it to look good just take it to a shop

look at some youtube videos too

So I can get the stuff from wal mart or what?

Just go in and have it done. I've seen some of the home jobs, and they don't look all that good.

yes you can

if you don't know how to tint i suggest you don't even try. For the rear window you have to heat shrink the tint to form to its curvature without melting or over shrinking the film or it will not fit right and as Dan said you can always tell a crappy tint job from a mile away. Squeegeeing the bubbles out isn't as easy as one might think either, trust me... spend the money to get a good job done right, it'* really not expensive.

YES YES YES! Take your car to a shop to get tinted. If you're doing all the glass in it, they shouldn't charge you more than $200. Anything more than that is a ripoff...trust me I know. Been there, done that. Gonna kick the guy in the nuts.