wow. search and stickies are your friend.
when i turbo'd my 5s in my old mr2 i needed;
turbo
manifold
intake
exhaust
downpipe
bigger injectors
a 3sgte Map sensor
an MSD timing retard
3sgte oil pan
oil feed and return lines
water feed and return lines (if your turbo is watercooled as well)
intercooler and pipes
BOV
and i may be forgetting something else, but just search it. you'll find your answers.
EDIT
http://www.6gc.net/forums/index.php?showtopic=5574 /EDIT wasn't hard dude.