My ex is abusing substances and homeless but still expects visitation as per our court order? What am I supposed to do?

The best thing you can do is to file a petition to modify parenting time.

My pregnant ex won't tell me where she lives and I believe she is lying to me about having a miscarriage. Do I have any rights?

You can file a paternity affidavit and a petition for paternity.

What can I do if my ex isn’t paying child support?

The best thing you can do is to keep working with the IV-D prosecutor.

You could try, but based on what you've provided here, that number is likely correct. If you disagreed with her proof, or lack thereof, you have to...

It depends on the terms of probation. Normally, no, you may not.

That just means they submitted additional documentation regarding the violation.

Yes, that could be considered solicitation.

How to evict my mother and her boyfriend?

You would need to give them a 30 day notice to leave. If they don't, then you could file for eviction after that.

Yes, until the child support is terminated by the court it is still owed.

Can my 7 year old daughter be taken away from me by her father if I have to work from 4:30 to 9:30 most evenings?

Yes, under the right to first refusal he'd be entitled to parenting time during that time based on the facts you've described.