Newb questions about motors & axis

Hello everyone !,

Thanks for reading...

I Assume I have 4 motors, 1 on Y, 1 on Z, and 2 on X which of course is the gantry. Would this still be a 3 AXIS CNC machine?

If so and I buy a 3 AXIS controller would I buy 3 or 4 drivers to connect to the X AXIS?

Or, do I buy a 4 AXIS controller and 4 drivers?

Thanks,