How many different fluds need to be put into a chevy cavalier; oil, transmission flud, radiator fluid?

are these the only ones. It is a 2001, 2 door cavalier, I suspect a leak and want to buy all of the fluds to refill the car with, but if you don't refil all of the fluids, it's risky.How many different fluds need to be put into a chevy cavalier; oil, transmission flud, radiator fluid?
You might want some brake fluid too. Windshield washer fluid, power steering fluid.How many different fluds need to be put into a chevy cavalier; oil, transmission flud, radiator fluid?
If you suspect a leak..... look for a puddle under the car when you park it. Or look for a wet area on the motor or transmission. Find where it's wet and follow the wet trail upwards to find the leak. Anything wet that leaks will always travel towards the ground. Repair the reason for the leak. It would probably be a lot less expensive than buying all the fluids that could possibly leak. If you're not sure about how to do this .. a competent mechanic will have the answer for you quickly.
first remember that most cars leak, but that is okay.......if equipped with air conditioning. There will always be a puddle if in use... then of course the leak from the exhaust when the newer cars are running verrrry well. clear water under is normally okay...
brake, power steering fluid. Are you leaving any stains on the concrete under the car? if so it is either oil or transmission. If the car is running hot It radiator. Had to turn power steering. I would get some one to take a look at it and tell you. it might be serious and it might not be.