If you are pro se on a civil matter can you hire an attorney to take it from here? And if so, can they file anything you missed?

Yes, you can. That would depend on what you missed; ask him/her when you hire them

I had a judgement against me individually, that expired in 2016 and the creditor did not renew it. Am I still liable ?

I do not know what you mean by "expired." The judgment creditor can continue to pursue you for 20 years.

What should I do?

You can file a hostile work environment and discrimination lawsuit and/or quit.

Never met this attorney, just via e-mail, guess new at firm he's taken over case, never filed Change of Attorney isn't it wrong?

You say " I have to file the Plaintiff's First Request for Production to Defendant" so I conclude you are the Plaintiff. But, I am confused by your...

There is no "special way." Simply call his/her assistant and ask the question or write a letter if it is a simple question. And yes, if it is a...

I I missed my court date what do I do?

Simple: contact the court and explain what happened.

A court would never "reverse" a substitution of party plaintiff. If you mean denied, then obviously the original plaintiff stays in place. If you...

Motion to return minor child to homestate ?

Then obviously you have done your best, unless you are hiding where the child is.

Do I still fill out a Fact Info Sheet, then served w a Subpoena Duces Tec w/o depo in aid of execut - Order to prod items listd?

I do not understand your concern with how many attorneys the plaintiff has had; that is irrelevant and none of your concern, any more than theirs...

Can I hire an attorney specifically for attending trial im lieu of my current attorney?

Yes, this is known as "coverage" counsel. However, your headline question asks about covering the trial, and in the text body you say a status...