I would recommend calling up the dealer, parts desk probably, and asking them. If your brakes already have the ability to have ABS just by getting a module it would be easy for you to install. Otherwise I would have the dealer do it. The cost is the module 400+ and the labor... that of course is if your car is ready for it or not. If your brake calibers and such are not prepped for it, the upgrade will be pretty expensive!
95 Toyota MR2 Turbo - 250rwhp