It doesn't hurt to try something new, if I fail at this it's okay. Everyone has to learn some way or another in some type of form or fashion. Alot of you guys are just giving me opinions and not giving any good input on how to install it.
Answered like 6/8 of your questions, at least vaguely.
A lot of what you're asking will have to do with what your goals are, you could get a massive procharger and build the motor and make 800hp, and then you'd need to upgrade entire fuel system, entire intake and exhaust, internals etc. But if you're going with a basic bolt-on kit then the kit should advertise expected power gains, as well as telling you what kind of fuel flow and air flow etc. you'll need to make it work.
A couple pounds of boost, and your fuel system might be adequate, a couple more and it probably won't be.
And the best input for how to install it, is to find a damn speedshop that actually wants your money, rather than one that just doesn't want to deal with you. This **** isn't basic and you can make your engine or trans go bang in a split second if you screw it up.