No, I was 13 years old ;)
you dont need one
Never get any piercing with a gun-style piercing machine no matter what. Gun-style piercing machines cause trauma, unnecessary damage, and scar tissue around the piercing that would not happen when proper equipment (a bevel-tip hollow piercing needle) is used.
Do not get it done with a gun! Its really dangerous and any piercing shop should know this, if a piercing place is saying they do it with a gun. Do NOT go to them. Do it with a needle only. Guns are only for ears, and your not even supposed to use a gun on the cartilage of your ear, it could shatter your cartilage.
Only if the person doing the piercing is a complete idiot, but generally there is no danger to eyesight from a tragus piercing. Please be sure to see a professional body piercer for this piercing and not some joker with a piercing gun.
No, Claire's don't do belly piercing. Claire's don't actually do piercing at all, they use a piercing gun which is not the same thing, and legally can only be used on earlobes. If you want any sort of piercing you should always go to a piercing studio.
You can buy armor piercing rounds for it, if you can find them.
they use a piercing gun or a needle
No, it is just a little "click"
Probably about the same, but 10ga is huge for ear piercing.
Any body piercing shop or tattoo shop that offers piercing services or Claire's. But, I have to say, it is preferable to get your cartilage pierced with a needle because a gun can shatter your cartilage.
An ear piercing gun sounds like a stapler. I had my ears pierced at Claire's recently and they are great at it. It's over in 5 seconds. its a small plastic gun and they position it at the ear lobe/cartilage and click its over!