At what point can I file a default judgement?

You identify no basis to file for a default judgment. The Court can eventually sanction her for the failure to make financial and CIM filings, but...

Why can I not move out?

Of course, you should know that, once you turn 18, you are an adult. However, since it appears they are still providing means for your support,...

In most cases, yes, he could use such a piece of evidence.

My son is 14 and wants to live with me, his dad?

If you don't have money to take her to court, and the mother does not consent, then there is nothing you can do.

Can they put a warrant out for my friend?

Yes, a warrant could certainly be put out. The rest of that is cop show nonsense.

Can l sue them for their negligence ?

Call them on Monday and don't overreact to something so trivial.

What legal liability here in Iowa does my daughter have for her 17 year old adopted daughter who runs away?

Liability is complete for the parent of a minor.

A "quick claim" deed is not a thing. Whether both co-owners need to sign a "quit claim" deed depends on the nature of their interest, because...

What can happen to me I sold the snap on tools I had for collateral against the loan so I could afford my house payment?

It is very, very unlikely that selling collateral for a loan would have criminal consequences.

Is a letter of intent to not renew a lease that has not been signed by that landlord binding and enforceable?

You were required to get written notice, that's all. The signature/notary and other stuff you mention is immaterial.