There's no reason to put two turbos on an Integra. It won't make it any faster.
You're pretty much never going to need to replace the transmission however if you start making a shitload of power you will probably need to upgrade the axles.
Bodykits are blech.
I would suggest pacing yourself here, go one area at a time and figure out how stuff works rather than trying to work out some kind of grand scheme to make a winning show/drag car (of which none really exist).