License is the correct term. Whether you need one depends on the local, state and Federal Laws that are applicable to your situation.
You don't need a gun license if you are 25 but if your under 25 you do need a gun license
You never need a license to have an Airsoft gun.
To get a gun license you would need to go into a gun store in the town you live in and ask for the information you need.
yes
No.
It depends on several factors; Where you are located and exactly what you mean by "gun license." Do you mean a license to carry a gun? A license to purchase a gun? A license to build guns?
You need to tell us more about the "gun license" and for what area. There are many different gun licenses.
You need to define the term gun license. In most of the US there is no license to own a gun. Some states require a license to carry a gun. others to carry a gun concealed. There is also a license to make or sell guns. All are different and have different procedures.
No
No.
Arizona
No.