Coisoecenas:
Tks for the repply. Just another question. For the max current how can I get it? Ohm law? I=motor resistance/12V? And about the controller? Any opinion?
Yes, Ohm's Law:
I_stall = 12/motor_resistance
For the controller, if you want to run each motor in both directions, you need one H-bridge per motor. Check out the motor drivers at pololu.com. If you want to run the motors in one direction only, it's simpler - you need a suitable power mosfet and schottky diode for each motor.