What is the legal document that others sign prior to examining intellectual property in order to keep it safe?

I agree with my colleague. You should use a non-disclosure agreement.

My boss asked me to open a po box in my name for his buisness, Should I do this?

I'm not sure what the legal question is here. What is the problem with your boss opening up a PO Box in his own name?

Can I print my designs and saying on blank shirts and sell them?

You would certainly need their permission to do so.

Do i need permission to use a "Bat-Man" costume for Non profit work?

I agree with Mr. Anderson, but my concern is that this is a "third party batman" costume. If it is officially licensed, then you may be ok.

Sounds like you may need a Criminal Defense attorney, but my guess is that it is generally frowned upon.

Is ebay liable if you report your pictures being used by a seller and they do not remove them , do have a lawsuit .copyright?

If these are your original photographs, then you have a copyright in them, and you can invoke the provisions of the digital millennium copyright...

I co-signed a car loan with now ex-girlfriend. Car is registered in my name as primary owner. She is secondary owner.

The car is not yours to repossess. Since you co-signed for the car, you are just as liable as she is.

What's the suggested way to run a PATENT SEARCH?

To get the most comprehensive patent search, you may want to consider hiring a patent attorney to conduct a search and a detailed patentability...

This is one of those questions that I see on Avvo all the time. In short, yes, and yes! DC Comics owns all the rights to the Superman logo and...

I have an amazing idea for an app but I don't want the idea stolen, how do I take steps to stop that from happening?

With just an idea, you have nothing that is patentable yet. You need to "reduce your invention to practice." Do you have an idea AND a way to...