If you cannot afford an attorney, you probably cannot afford an expert. Otherwise, there is no list of experts that work with self represented...

Sounds like you already talked to an attorney, and if so, if they didn't want to take your case on a contingency basis is your clue you do not have...

Go to the Oregon CCB's website and start the complaint process, which begins with a pre-complaint notice.

Employers have immunity for what they tell the unemployment office, so you could not sue for that. If they told other people, maybe a defamation...

He should be eligible for unemployment benefits, since he did not leave a job for this, there really is nothing else. Employment is at will.

Without seeing and reading the entire contract, no attorney would be able to tell you.

Generally speaking employers can require such, with a few exceptions. One would be if your work falls under the predictive scheduling law, but few...

Follow the process for complaints with the CCB: https://www.oregon.gov/ccb/complaints/Pages/how-file-a-complaint.aspx#main-content

What is an ATG? All Terrain Gremlin? If you mean attorney general, that is abbreviated A.G. or AG.

You should contact the Oregon State Bar's client assistance office: https://www.osbar.org/public/legalinfo/1174.htm