Will this go on my permanent record or can Fight it?

It is highly advisable for you to consult with an experienced criminal defense attorney for assistance with such a matter.

Can my sister still return her green card?

More information is needed such as the basis for her abandonment for her permanent residency and her initial eligibility. Consult with an attorney...

If your green card has not arrived, you can walk-in to a local USCIS service center and obtain a temporary stamp for travel.

Which immigration application should I send first?

Based on the nature of your questions, it is best to consult with an attorney in private. Good luck!

Should I try to get an extension or withdraw my naturalization application?

This is a personal decision based on your circumstances. For guidance consult with an attorney.

Was I unlawfully present in the U.S.?

I agree with my colleague that you can answer no for such a question.

Can I reentered the country with a temporary I-551 while my I-751 its pending?

Yes the I551 is sufficient proof and documentation for reentry while the I751 is pending.

Immigration VISA invalidate tourism VISA?

She can attempt entry with her tourist visa with the pending immigrant petition with travel itineraries and return tickets but it is questionable...

I am the custodial parent of my son do I need his father permission to transfer school back in my district?

It is best to consult with a family law attorney for such a matter.

Do I need a joint sponsor for form I-864?

Yes you may count your husband as a household member since he was legally authorized to work in the US.