i dont really know nothing about accords, since its my girls. 1994 accord

I haven't done nothing really to the car for awhile except oil changes.
Can anyone tell me what i should get done to it that are included in the tune ups/
i know i want to change the spark plugs (how many and any suggestions what brand) and fuel filter but other than that im clueless.
i cant even find the air filter in this car.