Welcome to the board :O) I hope you enjoy your stay.
As to your questions:
1) I'm sure the board sponsors will be your best best for aftermarket and OEM parts - Click the link top right and you can browse a bit.
2) Reliability is difficult with a car this old so I'd say somewhere between 1 and 10 is about right
3) The basics can be done by any mechanic but I wouldn't bet on anything. My advice would be to ask here before doing anything! Broswe, search and learn all you can about your two on the board. You will find it's an invaluable source of knowledge - including things like porno films (Raptor
) and various mad ramblings (everyone else apart from me and Ben
)