Is one of the bulbs shorted? Sometimes when a bulb blows out you'll get a short. Replacing the bulb solves the problem. Remove the headlight bulbs and check them both with an ohm meter to see if you have a shorted one. While you have the bulbs out, replace the fuse and see if it blows again
My Rhinos are yellow plastic, very solid and rated at 12,000 pounds. I've had 3/4 ton diesel trucks on them several times, so the TC is no load at all for them. They still look near new after more than 20 years
Those wooden ones look very solid too, but my Rhinos lift the vehicle several inches higher than those do
In the old days, Ford had poor quality switches. The little spin dial on the dash didn't work properly, or the multi-function switch stalk on the steering column. Some people were able to remove them and clean the contacts, and they worked again. Some people simply installed new parts. With any luck, you should be able to pickup those parts, install with a little dielectric grease, and you'll be back on the road. No way any and all of those issues are on the same circuit, so it probably won't be fuse or relay. Worst case scenario, it could be an issue with the Body Control Module which controls the lighting.
As for the air bag light.....Not fun. A lot of work. Take apart all of the panels to get to the airbags, removing them, cleaning the contacts, and reassembling.