Is it possible to petition a court for a reduction in probation for time spent incarcerated?

It's not going to happen. Your best bet is to cooperate with your PO.

How to help my brother? She never came to court?

He is going to be required to register as a sex offender.

Show up at the station and pay your bail. It is probably nominal. Best to clear this up right away.

What are the "standards of cleanliness" in Pennsylvania? Am I to be held to my landlords standards or is there a guideline?

If your lease doesn't require a standard of cleanliness, then you can keep your room as you choose.

Simply stated, it's probably a "last call" to see if both sides can settle the case before trial.

If it was possible would it be legal to clone a human being in PA? And employ him/her?

This is not a practical legal question.

Is it a concern to hire an attorney that is related to the DA prosecuting your case?

It may be to your benefit! You are right to have questions about a possible conflict of interest. Ask your lawyer about it. Make sure he/she can...

I was recently caught stealing from walmart and have no prior offenses at all on my record. what is the worst possible outcome?

Probation.

Can i get a public defender to reopen my closed case to get it dismissed to join the military?

If your career in the military is riding on this expungement, get it done right. Retain local counsel to see to it that this is off your record.

Question in details

Yes. Terroristic threats require communicating an intent to commit a crime of violence. In reality, the DA may opt not to prosecute you.