Yes, As long as the resicency status is Permanent. In other words you have to have a green card. A work permit is not enough. Nor is any type of Visa
Yes
It is possible for a legal resident alien to own a firearm in the United States.
You can't really "check online" but if you qualify to own a firearm anywhere in the U.S. you can own one in Florida. Basically, you have to be a non-felon and have disqualifying misdemeanors.
That will depend on the weapon, and the law of the place where you are. In most of the US, the only requirement to own a firearm is that you be an adult, of legal age, not a criminal, illegal alien, a mental subject or drug addict. In MOST states there is no permit to own a firearm. In other countries, other laws.
It is legal to own air rifles in Pennsylvania, but it is not legal to hunt with them, even with a license.
You need a lawyer for a current, legal and correct answer.
If a person has a felony you cannot own a gun. It does not matter how long you have had the felony.
Not in Flordia, nor in any other state.
No you do not have to be a gun expert to own a gun. As long as you are of legal age to own a firearm and you do not have any felony offenses on your record, you can own a gun.
Technically, a trust can "own" any item that you put in it. But to make the answer a little more specific, a firearms trust can own any legal firearm. All you have to do is list it on the Schedule A.
A felon can be "around" a person with a firearm as long as the felon doesn't own or possess the firearm, however, "possess" is subjective. If the felon can access the firearm, it might be considered possession if something were to happen.
I hope not. ADDED: It IS LEGAL FOR YOU to be able to own a firearm, HOWEVER you had better keep it somewhere else. It is not lawful for a convicted felon to be in the same house with it. Court decisions have ruled that such a situation places the convicted felon in what is known as "concurrent possession" of the firearm and they can be charged with "Unlawful Possession of a Firearm."