Did Albert leave a note or otherwise attemp to contact the car's owner?

Did Albert and Bill stop in response to Ted's shouts before Ted lunged at them?

I don't see Bill being liable for much of anything, unless it is for exceeding the speed limit in a 20 mph zone.

Albert is responsible for the property damage. Albert should be charged attempting to leave the scene of an accident, and possibly Bill as well if the state has a law requiring witnesses to stop, or if he is seen as causing Albert's actions.

If Albert and Bill were stopped and waiting and Ted was about to lunge at them in a manner percieved as threatening physical violence, Albert might have a reasonable self defense argument. If Albert and Bill were in the process of fleeing the scene, then Ted's action could be seen as attempting to restrain them, in which case Albert would have committed a battery.

Comes down to the details, and we need more details.

Not a lawyer. Never touch the stuff.