depending on how much hp you want..... manifold, turbo, injectors, maf, fuel pump, engine managment, IC, oil lines, maybe water lines, couplings, lots and lots of fittings and clamps, IC pipes, BOV, vacuum lines, some teflon tape, anti-seize, higher heat range plugs, downpipe, gaskets, clutch, brakes, exhaust, motor mounts, air filter and intake tube, gauges if you want, drill and tap the block for the oil drain, get a fitting for the block, maybe a fuel pressure regulator, I think that covers most of it.
might want to read up some on www.se-r.net and do a google search
lots of cash,time and patience and some mechanical skills if you're doing the install yourself. you can either piece your kit out. if you get the right deals, then you'll save money. you can find some kits readily available for a good price through JGY.