Is it considered a threat for a grown adult to say that they will send a kids parent to jail?

Sure sounds like a threat, though not a threat that carries any legal liability.

Is this slander?

As you describe it, this doesn't sound like slander.

Can i go to jail

If you were arrested, of course you need a lawyer. If not, stop writing about crimes you commit, and better, stop committing crimes.

As you have described it, there was no arrest, no charge, nothing to report.

You need to speak with a lawyer who practices both criminal defense and immigration law.

What is my best course of action? Are there grounds to file a motion for dismissal?

The evidence you mention may be grounds for the district attorney to dismiss, or for a defense at trial.

IIf the person signed the back of the title and put our name on it as the one who bought can they get us for theft?

Charges are fairly easy to bring; a title signed over voluntarily, and a bill of sale or other proof of purchase, is a pretty good defense to car...

Is this considered child abuse or neglect?

You shouldn't be discussing this on a lawyer forum; if factual, you should be reporting this to the police.

II have a worn out from my Arrest in Colorado but I live in Georgia The courthouse in Colorado said I need someone to represen?

The courthouse was right: you need a lawyer to negotiate a settlement, which may or may not require you to come back to Colorado. Violation of your...

What can I do about a warrant i didn't know i had a court date how can i take care of it?

Call the clerk of the court and ask, or hire a lawyer to do it for you.