The government is immune from suit in such situations, so you cannot sue.

You can not press charges. You can call the police who will decide whether to pursue.

Similar situation happened at my son's wedding. We showed up for the rehearsal dinner and the facility had put down the wrong date and had nothing...

When you leave an unregistered car on a public road it is subject to tow.

Respectfully, you are not going to be able to "ask a lawyer" about every step during a trial. The court is going to hold you to the same standard...

You can report him to FB and get him banned. No basis to sue.

You don't point to anything that the church did wrong.

You certainly are required to let him know where his children are living.

Not a legal issue. Hire a tutor or do extra work.

This is a fairly common scam. I don't think you need to worry, and you certainly shouldn't send them any money.