If you search, there's tons of info on this. For starters, check out the link in my sig.
1) Yes they will fit.
2) Depends on if you're a 4wd or not. 4wd expect 1/2" front, 2wd expect 1" front, and either way expect .25"-.5" rear. This varies, but it seems to be pretty close.
3) You can use new shocks, but not required.