The airbag and horn not working could be related if the fault is with the clockspring reel under the steering wheel.
Whatever it is, you need a scan to retrieve the trouble code to confirm. Most advanced repair shops should have scan tools but you most probably have to pay them to get the scan. Get the trouble codes and let us know the EXACT codes, not the description.

As to the TPMS, did you check and confirm the tire presures are correct? Was anything done to tires prior to his occurring?
Do you have the owner's manual where you can check the procedures for resetting the TPMS?