The agency that issues the license will tell you.
You do not need licenses for airsoft guns, as they are not firearms.
All guns use gun powder except Air guns and Air rifles
That depends entirely on where you are, and what you want to do. In the US, on a Federal level, there are permits/ licenses to be a dealer in guns, an importer, manufacturer, collector, dealer or manufacturer of machine guns, etc. Some states require a permit to purchase a gun or possess a gun, and a different permit to carry a gun, or carry a gun concealed.
any gun besides airsoft,bb guns, Paintball, and pellet guns or anything above a pellet gun (22's 223's and so on) use gunpowder
A Stolen gun
It's not about the guns! It's the people who use the guns.
You have to go to the imvu catalog and buy a gun and then go into a room (where guns are allowed) and you get your gun and it should say "shoot" and you shoo.
There is no such thing as a gun license in the US. There are concealed carry permits/licenses and dealers licenses.
Guns are expensive. Use of a gun is not instinctive, and requires training. Like any tool, a gun that is misused can cause serious injury or death.
Nope. Pellet guns are fairly safe to use.
Colt 1911 defender
Different guns for different purposes.