It all depends on the country and location where you live
No you don't
Do you mean an air Rifle? NO, Not in the United States.
No. Just have to be old enough!
no
are you asking if you need a drivers licence? walmart sells them but I believe you have to be 16 or18 to buy them
If it fires a projectile, it is classified as a firearm and you will need a licence for it. Your local District Firearms Officer will be able to advise you in more detail.
No. Not yet.
Usually not but it depends on the country where you live.
Depends on the air rifle. England restricts certain higher powered air guns that have enough energy to be useable as a weapon.
You will have to provide the caliber and whether it is pump or CO2 powered.
can i ship air rifle to trinidad and what i need
The length of the barrel. Guns/pistols can be held by one hand. While a rifle requires two hands to properly hold it. Both are air powered.