There are no permits required for paintball guns.
You can dry fire a "REPLICA" gun if the action will allow. Some "REPLICA" guns will not have a true action and therefore cannot be fired. NEVER try to load live ammunition in a "REPLICA" gun.
It may or may not depending on the type of replica.
no
Non firing replica
yes
Try google
No, you do not.
watever
Laws on this vary by jurisdiction.
It's a copy of a gun/rifle that can't fire.
A collector would want the original. Sometimes (Most) the original is worth more than the replica.
Walther PPK, made famous by the early James Bond movies