Hello all. New to Lego. On a basic learning curve.

Can someone help please.? Iv'e been lucky enough to obtain a power set. However I do not know the Lego number of the items. I know that a some future date I will be able to insert these into sets. But if the set itemises particular motor function, how will I know if it fits. I've tried to find details on various sites, but am at a loss. Information or direction would be most helpful please.

I've put a link to the purchase. I don't know how to place a picture yet.

37 PCS Motorized Building Set - Advanced Construction Kit with Gears,Rechargeable Battery Box Remote Control Reinforced Axles, and Remote Control : Amazon.co.uk: Toys & Games

Update

I know that they are M, L, XL, and Servo. But do various sets refer to numbers. Am I missing something?

Edited 1 hour ago1 hr by rossjackson01
information added

I don't know if these are even legit LEGO parts, I would guess they are aftermarket parts.