The state and Federal Laws that govern the sale of firearms apply at a gun show the same as anywhere else. If you are a licensed firearms dealer (and people that are in the business of buying and selling guns for a living are required to BE licensed) you must follow the same rules and procedures as if you were selling a gun in your shop. A private citizen may sell a gun at a gun show without those procedures, just as if they had put a "for sale" ad in the local paper. Some states have additional restrictions beyond the Federal law. A popular misconception is called "The gun show loophole"- when in fact, there IS no "loophole". If it is illegal for you to buy a gun at the shop, it is illegal to buy one at a show. If you cannot sell a gun to a minor at your home, you cannot do that at a show.
No, you do not need a gun license to buy magazines.
yes
No.
no
Yes, you do not need a gun license to buy a clip, but you may need one to legally possess and use it depending on local laws.
no
yes, you just need a license
Generally, no.
No ... but their may be an age requirement.
No.
It would depend on what state you live in ... but in most states you would not need a license ot own a softair gun ...
You don't need a gun license if you are 25 but if your under 25 you do need a gun license