yes
YES
Yh
No
Yes.
Providing that you are operating in compliance with the restrictions of your DE learners license, yes, you are legal in PA.
There are no laws about owning or driving a right side drive car in any state of the US.
If you are operating and obeying whatever restrictions and limitations may be placed on you while in your learner's status, you can drive anywhere in the US.
It is legal for a citizen to carry Mace pepper spray in Pennsylvania.
Pittsburgh is IN Pennsylvania
Yes they are legal to purchase
No.