Start reading here
http://forums.offroadtb.com/viewtopic.php?f=15&t=20 This should handle your initial questions.
Then go here
http://forums.offroadtb.com/search.php or use the big red search button in the upper right hand corner. If you still have questions after that you can come back and ask questions. Don't get mad if we give you a better search term or do a little of this

or

. Most of your basic questions have been covered numerous times.
Maybe give us an intro instead of coming into a bunch of strangers and say I just spent a lot of money on stuff to lift my truck, got the rear shocks but I don't know what shocks to buy for the front. Where did you get the information on what to by for everything else? You picked a bad first post...