Starter replacement......needs to know how many cylinders my cars has

There is one starter and as many cylinders as the engine was designed for. 2,3,4,5 ,6 or 8

The cylinders are in the engine block and the starter motor hooks on the back of the engine beside the clutch housing where it engages with some teeth on the flywheel.

You turn the key the electrics engage the starter the starter turns the flywheel and the cylinders go up and down .

Fuel is pumped into the cylinders the electrics on a petrol engine provide the sparks and if it all works the engine runs

The starter has no cylinders. it is an electric motor powered from the battery and ignition system.
The chevy cavalier has a 4 cylinder engine though.