Oil Filter = Z145a
Fuel Filter = Z201
Air Filter = A360
If you have and Auto you are best to change the Trans Fluid and filter every 50,000k's. If you have and LSD, which all Turbo Skylines have you should change its fluid with the trans flud. An lsd is almost useless if the Fluid is maintained. Manual Trans Fluid should really be changed at 50,000 to 60,000k's also just to b safe, especially if you drive it hard. Coolant Should be changed every 2 to 3 years and Brake Fluid every 2 years. Power steering fluid really should last you 100,000k's.
Im fairly sure the pads on all skylines are:
Front = DB1170
Rear = DB1220
Discs; (Not 100% sure if these are right for r32 GTST)
Front = DBA4963
Rear = DBA908
I use NGK BCPR6EVX Plugs in my R33, but if you drive hard you should use a 7 heat range. BCPR7EVX