The horn suddenly started honking on its own. Then one night while we were gone, it bonkers non stop for 10 minutes. The next day when we turned the car on the horn would not work, the cigarette lighter did not work, and the bass did not work either. How do we fix it?

You probably have a short in the horn switch circuit. At some point, the fuse in the lighter/horn circuit blew out. Replacing the fuse is the easy part; it's probably in the glove compartment or under the dash near the glove compartment. The hard part comes first - where is that short circuit? I'd look closely at the wiring coming out of the steering column under the dash for wires with cut or broken insulation. Also, check the wiring to the fuse box that has the horn relay inside (usually under the hood) - maybe a rodent has been chewing on the wires.

In the worst case, the problem is inside the steering column with an airbag waiting to go off like a bomb if you make a mistake while working on it.