Will this fit in the door without removing the window glass?

You'll need to drop the glass down to access the regulator mounting bolts inside the door. It's a standard procedure — no cutting or drilling required if you're working with factory mounting points.

Does this come with the clips and fasteners to bolt it in?

The assembly ships as a motor-regulator unit. Verify your hardware before installation — some fasteners may be reusable from the old regulator, but you might need replacements depending on condition.

What if the motor runs but the window won't move?

Check the regulator tracks for debris or damage before assuming the new assembly is the problem. Also test the switch and wiring — a bad switch sends current but no command gets through to the motor.