It depends on where you are and what you mean by "license." In the U.S. in most states, you have to be 21 to get a handgun carry permit. In most states, you do not need a license just to own a gun.
i have a old gun and i need to find out how old it is and if it was used in a war long ago. i need to know who used to own the gun.
Your parents will decide.
That would depend on the gun range and its operation rules.
you need to be 18 and older
you can be 10 but you need a hunters license
You will need to look in old gun catalogs, Blue Book of Gun Values, etc..
You need to tell us more about the "gun license" and for what area. There are many different gun licenses.
Depends on how old Montana is.
you have to be 83 years old :/ hah pooo
With the permission of your parents- any age where you are old enough- and strong enough- to hold a gun. Without the permission of your parents, you will need to be 18.
To find out how old a Winchester rifle is one would need to take the rifle to an appraiser or gun shop. The gun shop will be able to look up the gun by the serial number.
You need to contact your local authorities.