The way to enforce the agreement is just like you would enforce any other contract. File an action for breach of it.

Can I have my sons girlfriend take a lie detector test since his passing?

Unfortunately, the statements of a medium and visions you have are not admissible as evidence in any kind of civil or legal criminal proceeding. ...

What can i do to stop my neighbors from slandering my name associated with drugs

As them nicely to stop. Failing that, file an action for a civil injunction. That gets very expensive very quickly, though.

I have a trl and a intoxalock in a car that is my uncle's I use for work can I buy a car and put it in my name and not drive it?

Buy a car that's not legal for you to drive? Why would you want to do this?

Can I sue my employer for terminating me based on heresay allegations of threats of personal harm?

You could certainly sue them, though it doesn't sound like you would have a case.

Do I qualify for my severance package

There is no legal right to severance; it is entirely up to your employer.

Can a police officer take your drivers licence if it has not expired?

Under the right circumstances, sure. But I have no idea what your circumstances are here.

If a land lord gives you a typed out letter of notice to quit property to move out. Does the tenant still get the 30 days

Nope, wrong. Thirty days are for some notices, three days for others.

Is a buyer entitled to the down payment made to a private seller that wrongfully repossed the vehicle and breached the contract

Maybe/maybe not. Facts are what make the difference.

Ok, so you were convicted, you didn't disclose it, and, as a result, you lost a job offer. That's exactly how a background check works - did you...