This sounds more like a math question. If your question is why your son got what he did look at your retainer agreement and ask the lawyer for an...

That's an awfully broad question. You should really consider retaining local counsel to walk you through this process.

You cannot get a restraining order for someone "talking trash."

I don't see anything here that would lead to a dismissal. Seek out a local defense lawyer.

Not a legal issue...............................................................

You may well have a case. Report to the cops first and then seek local counsel.

One option is to retain an attorney on an hourly rate to review all the documentation and explain it to you.

Set up a a meeting with the school. Unclear how you know "nothing happened." Expect the teacher to have a very different story.

No, but you can certainly quit using it.....................

I would go to the school board before dropping 10K or more on lawyer's fees.