Calibration of the compass wont affect motors starting up .
Have you checked all TX controls are going the right way ? and carried out the Tx calibration ?
Throttle should go from Far left to Far right on the TX screen .
Rudder when push right on the stick should move from center to right .
Elevator when push up on the stick it should move center to right
And Aileron from center to right when push right .
Also check the copter is not in failsafe , so make sure your 3 way switch is selecting all modes , Manual , Atti , And Gps Atti .. and they are highlighted when selected.
Once this is done and the copter is unplugged from the usb , but do first tests without props on .. Push both sticks down and to the centre to arm the motors .
Hope you get in the air soon

Geoff - Quadcopters Uk