somewhere under the steering wheel or lower dash panel (hard to see from the illustration), and you push the reset switch and hold for over 1 second.

If you can't start it after that, then something other than the inertia switch is holding you out. I doubt it though, where your impact is shouldn't have damaged any wiring harnesses or fuel lines (they are behind the frame rails, the vehicle would have to go through you to get to them, and your doors stopped you.)

And your engine bay is intact. I understand why you want to drive it than pay for a tow.

This rig looks like it could be fixed, but I bet insurance totals it because of the airbag $$.