Is the rear wheel cylinder and the drum the same thing?

no, the wheel cylinder has two pistons that push your brake shoes against the drums

no sir, they are both part of your rear brakes but different parts. the wheel cylinder pushes the brake shoes to your brake drum.

Because of your lack of experience you need to spend $26.95 to get all the factory info on your car for a whole year. www.alldatadiy.com Wetry is correct, you are dealing with a life and death repair. To replace the wheel cylinders is not hard with the proper info.

the drum works as a friction plate to stop you and the wheel cyl is what extends the brake shoes