How can I protect myself and can I prove these people are suing me to get money and not because they were really injured?

Report it to your insurance company and let them handle it.

Can i file suit if i needed a route canal and they filled the tooth instead now my gum is affected and it has to be pulled?

Probably not. Not getting a good result and malpractice are two different things.

Can I argue this debt is dischargeable or is a loan considered a credit card?

This is a question for your attorney. If you do not have an attorney consider consulting with one.

Can I talk about my car accident?

Question is not clear. If you were injured consult with a local attorney.

It could be either. Get local personal injury attorney to review.

Can I sue parking garage in this case?

You can file a claim but recovery would be minimal,

If a person is having complication with a surgical mesh that was used in an operaton in ND, would that be cause for a law suite

More information is needed, however she can consult with a local malpractice attorney to have the records reviewed.

Do I have a legitimate case to sue the dentist/office?

It sounds like a difficult case. Hopefully you will improve with time. If not consult with a local malpractice attorney.

Can I sell my mother's house prior to closing of probate?

You should be able to as long as you have court permission.

Is there any action that I can take for being falsely accused of causing an accident against the TRUE at fault driver/insurance?

You should just let your insurance company handle it.