I will answer
all your initial questions. Because I am such a helpful bastard.
Start right here:
http://www.sr20forum.com/turbo-guides/
Read every single section. Twice.
Then re-read them one more time for good measure.
Then,
and only then, ask more questions. In fact, feel free to ask more questions once you have thoroughly read and processed that entire section of information.
Do not listen to "your friend, mechanic, best buddy" or "the guy who sold you the car." They are all ignorant dill-weeds.
Read that information, all of it, and get back to us with anything that requires clarification.
You're welcome.