As the child is a minor, it is the responsibility of the parents.
If someone hits a parked car then they are automatically liable.
Unfortunately, the parent (s) of the child are liable for the damages to the car, since they're fully responsible for the child's actions.
Yes. You are responsible for parking your vehicle in a way that damage will not be caused to another's vehicle. So say you park on a hill and the vehicle rolls back and hits another vehicle, you are liable.
As long as the parked vehicle is parked properly and not illegally parked in any manner, then the vehicle that rear-ended the parked car is at fault. Now if the parked car is sitting illegally (such as double parked or parked in a no parking zone, etc.) then the parked car is at fault or even both the parked car AND the car that hits it are BOTH at fault.
The insurance company of the car whose door was opened will pay for it.
Pain or death for the child.
It's difficult to imagine circumstances in which the owner of the parked car could be considered to be at fault. Almost always, the driver of the moving car will be found liable. Even if the car was not parked properly, the driver of the other car generally will have had the "last clear chance" to avoid hitting it.
If an at-fault driver hits a parked uninsured vehicle, the at-fault driver is typically liable for the damages caused to the parked car. The owner of the damaged vehicle may file a claim with the at-fault driver's insurance for repairs or seek compensation directly. If the at-fault driver does not have insurance, they may need to pay out of pocket for the damages. The owner of the parked vehicle may also have difficulty recovering costs if they do not have their own insurance.
Laws very from state to state. Generally speaking a bicycle must follow the same laws of any other vehicle. (likewise, dirvers of vehicle smust treat cyclists as any other vehicle).
That depends on the age of the child. If he is younger than 18, then it is your responsibility.
The driver of the vehicle is always responsible for whatever his/her car hits regardless of where it is. If the child ran into the can with their bicycle, then that's a different matter.
The driver/passenger opening the door is at fault. Look it up under the traffic laws in your state.