It generally means you and your insurance company are liable for the repair to the other vehicle and any other bills incurred.
Either that or they hit you!
if the person didn't mean to no sorry
If you back up and hit the brakes and the car stops running, this is likely to mean that the car is not working properly. It is most likely to mean that the fuses are going out.
nothing, that the bird died?
you snapped the little pin in the trany. big money
If with "one impact from the last car" you mean that the rear car hit the middle car and then the middle car, as a result, hit the front car, the rear car's insurance would be responsible for all damages. If the middle car first hit the front car and then the rear car hit the middle care, the rear car's insurance would only be responsible for the damages to the middle car. i.e. where was the first impact?
Any amount you want. Doesn't mean you will get it.
Nothing. It was just an accident. Be sure to get your windscreen checked if it hit that.
The insurance will pay for the car you hit.
The car hit her, she died.
The car behind you
Yes, it could may mean the car is not safe to drive, have it checked/repaired by a good garage.