How are medical bills any different than a credit card bill? can doctors and hospitals threaten collections?

A debt is a debt and medical bills, whether on lien basis or not, are ultimately your responsibility to pay.

Do my daddy girlfriend have the right to be on his beneficiary even though they are not married just living together Texas.

You need to consult an experienced family law/probate attorney in Texas. Also, we need more facts to answer your questions, like what rights is...

You need to consult a family law attorney in Texas.

When filing a k1 petition what other paper work do I need to send with it?

You need to retain an experienced immigration counsel to represent your interests.

You need to consult an immigration attorney, since your situation is factual based.

I want to know that are we able to green card on marriage ?

In order to get a green card through marriage, one party must be a US citizen.

Advance parole for DACA

Your friend needs to hire an immigration attorney.

What if I get stopped with expired tags on my vehicle

Your girlfriend may get a ticket for driving with expired tags on her vehicle.

Can I sue the dealership that sold me my truck?

If you can prove that the salesman lied to you about features that were important enough that you would not have bought the truck otherwise, or...

If there is a lease specifying this, then yes generally your landlord can tell you or your guests where to park,