Yes.
To my knowledge, If you are a Convicted Felon then you are forbidden from owning/possessing a firearm in ALL states, not just one area. I admit I could be wrong about this, if anyone else has better information feel free to update this answer.
Not in ANY state. Covered by Federal law.
5 years- Federal law. No probation, no parole.
It depends on what you mean by "ex" felon. Generally speaking, there is no such thing as an ex felon. People typically used the term ex-felon to mean someone who is no longer in prison, but the person still a felon. If a person has a felony on his record, he cannot legally own or even possess a firearm, and no state will issue a gun permit to him. The exception to that is a felon who has had his rights restored. This is something you have to request through a legal process, so if that has happened, the felon will know it.
It is highly unlikely.
Yes, and many do.
You need a lawyer familiar with the laws of TX, lots of money and patience in order to find out.
There is no such form. Your question doesn't say - but If you are a convicted felon, Federal law forbids convicted felons from ever owning or possessing a firearm or ammunition. (US Code, Title 18)
Park Tower
Yes
Ask your PO, but I don't believe convicted felons (even if not on parole) are allowed to carry (or even be in the presence of) firearms. Not Exactly: Felons are allowed hunting licenses. A felon without rights restored may use a bow or crossbow. A felon with rights restored may use a modern gun. Some felonies can be redesignated misdemeanors, too. Possesion is two fold. A felon, rights not restored, may not be in actual possesion, that is, holding touching; actual control of a firearm. Being around others in control of theirs or at a gunshow is OK. There is no "minmum distance" like in a restraining order. There was some discussion whether a muzzle loader may be used, as it isn't a firearm by federal law, but this is up in the air. It was legal in TX for a while. Refs: "restore your rights and own a gun", my state's law, federal law. Going thru restoration process right now.