WOW, I don't know where to start with you.
First tip, use the search tool, a lot of your questions can be answered by old posts. I learned a ton this way!
1. body kit = Blitz and veilside are both very nice, but blitz hangs lower, not sure how much.
2. APR wing = you can get one right here at the ecelica store!
3. 17's = no doubt, Racing harts are always a good choice but cost big bucks
4. exhaust = TRD, most gains, low price, great sound and look!
5. springs = TRD, 1.2" drop, only cost about $170.00
6. enginge = right here at the ecelica store, everything to get you started!
Also check out these sites:
http://www.nopionline.com/index.cfm...akeid=420&vTitle=TOYOTA&vaffid=0http://www.trdtoyota.com/TRD/index.htmhttp://www.toyotaparts4u.com/e_catalog/http://www.luidesigns.com/Home.htmhttp://www.wheelmax.com/Wheels/racinghart.htmhope that helps