Ive been driving this car for about two years now, and its getting kind of beat up.(Gonna get it re-buffed, re-waxed, re-painted, lots of interior work to do.)

While I'm at it, I was wondering about doing some extra work, body kits, maybe? Audio? Tuning?

(Its an automatic transmission, don't know if itll affect much.)

So, I guess the main things are;

1) There are eight speakers in the cabin. What are the sizes of each pair?
2) Are there any body mods that would look good on the car?
3) Is getting the headlight wipers fixed worth it?(I'm leaning towards, yes, it is.)
4) Does the car come with an amplifier, and if not, where would the best place to put it be?
5) Underglow lights? Or nah?
6) Performance tuning suggestions?
7) There's a lot of trunk space. Should I go with three 12" subs, 2 12"s and an 8", or....?
8) Is it possible to convert it to a manual transmission? Would it even be worth it?
9) Supercharging? O:

I'm not really a car guy, but I want to beef my car up a bit.