In order to prevail in a lawsuit, there must be an "injury" of some type. Without an injury and some type of damages, you have no claim.

Your question starts with "I committed arson!" Do not make any admissions on a website that can be seen by any person on the internet, including...

You need to hire a lawyer. Hopefully, a history of calls from your phone will prove you attempted to contact your PO to show you were not absconding.

You might be able to posts property bond if your equity is more than $20000. Ask the court.

Yes, your PO can require you to report in person. If you do not, you will end up in jail or prison with a whole lot more risk.

The best way if you would like to stay out of jail is to hire a lawyer to have the matter redocketed and the bench warrant set aside.

As long as you are not a "prohibited person" as defined by 18 U.S.C. 922(g) and the courts have not restricted your rights by court order to...

You need to show up at court or you may end up getting arrested. If you want legal advise, you should hire a lawyer.

You are likely to be charged with Theft by unlawful taking or disposition - shoplifting under $500 which is a class b misdemeanor. Hire a lawyer.

You need to hire a lawyer to discuss this. You might get a sanction or you can get revoked. It all depends on the PO, the prosecutor and the judge.