No. Pennsylvania doesn't have gun registration.
No
Since they are not registered, there is no way to answer your question. In the US, MOST guns are not registered- there is no law requiring that guns be registered. It is a popular misconception that there IS such a requirement, but there is none on a Federal level.
IIRC, they were all legal.
No.
No - that is theft, all the same. Theft of a firearm is a felony.
Almost all guns are manufactured with serial numbers and are traceable, provided they are registered when purchased or transferred to a new owner.
Most all Walmarts sell BB guns
There is no requirement or provision to register a shotgun in PA
Like most of the US, there is no registration of guns in Texas.
You cant'.
No- see link below.
No, but gun owners do.