Easiest way to tell is in the engine bay. To the left of the head there will be the abs actuator (a device with brake lines going to and from it). Its between the intake manifold and the cruise control. If you dont have this you dont have abs. Well that and the abs light in the guages hehe but it could have blown.
Anyway the rotors and pads are the same regardless.
May I ask what types of rotors you are getting, F & R, and from where?
I ask because
http://www.raceconcepts.net has some damn fine prices (call as the listed price isnt real as its about 190 - 195 for all 4 brembo CD & S rotors) and their service was top notch for me.