Such listings are not made available to the general public, nor should they be.
Depends on the laws in your state or country. In the US, firearms registration is virtually nonexistent, save for NFA regulated firearms, and in the state of California (which, even then, is very limited in the scope of what gets registered).
Colorado does not have registration of ordeinary firearms, so there is no way to have a gun registered to you.
Law enforcement only.
As a private citizen, you can't.
Firearms are not required to be registered in SC.
You can't.
Your local police can provide you with a correct and up to date answer.
Depends on where you are. In most of the US, there IS no registration of firearms.
No system to do that. Most of the US does NOT require firearms to be registered.
No, there isn't.
Check with the organization that is responsible for registering firearms where you live.
No. All firearms should be registered or licensed to a responsible holder to avoid accident or illegal discharge.