Relatively inexpensive to purchase, and to prchase ammo, the .22 rimfire also has very low recoil, and is much quieter than larger caliber firearms. The habits learned with a .22 carry over to other handguns
The basic answer is, almost anything. It's legal to hunt with a handgun in most (maybe all) U.S. states, but it is usually subject to a minimum caliber restriction. Some of the large bore pistols such as the Smith .500 or the .600 Nitro will take down almost anything on this continent.
The basic answer is, you can't.
It depends on what you mean. If you mean legally, it depends on the state. Some states require a handgun to be carried in a holster, but most don't. In Tennessee where I live, if you have a handgun permit, you can carry the gun any way you choose. Otherwise, you basic options are, holster or not in a holster.
The most basic answer is no, if you have a felony, you cannot legally buy a handgun, regardless of the age. However, it is possible to sometimes have some of your rights restored, so you may want to check with a local attorney familiar with that process.
The basic answer is no. In most states, you have to be 21 to get a handgun carry permit, however, I think there are one or two states that will issue handgun carry permits to people 18 or older.
The basic answer is, you can't. In the U.S. there is no federal registration, and registration is only required in a few states.
Barrel, Trigger, Trigger guard, hammer/striker, front sight, rear sight, chamber/cylinder, frame, grip.
The most basic answer is, a 9mm has a smaller diameter. Other differences, (in most cases) less muzzle energy, smaller and lighter bullet, higher velocity.
You mean a .45 caliber Glock, right? There is no model 45. New-In-Box, you'd be looking at ~$600 - $700 for a basic model.
Any where from $300. For the basic .22 up to $800. Fot the big boy large caliber rifles
The basic answer is no. There is no federal registration required, so there is no such thing as a federal registry, and in the few states that do require registration, the average person cannot access the information.
Basic Physics by Karl Kuhn is an excellent self-teaching guide.