Do I have a case?

Not clear what you are saying. You wrote that the oil was there at the moment of the breakdown--so does it mean the oil change place did nothing...

Can the dealer sell your trade in before the deal is done and then, switch you out of the vehicle and put you in a loaner car.

Your question is not clear. If you agreed to the second deal, then yes, they can, and they did. You were entitled not to agree to the second deal.

Can I leave the hospital against advice?

Yes, you can leave the hospital against advice. Will have to sign some papers promising not to sue them, etc.

No, they can't do this. Violation of Sec. 2C of the Consumer Fraud Act. You should sue.

What should I do?

I very much doubt you can prove overcharging. But weirder things happen. Like AT&T doing "pay to play" to a personal lawyer of the so-called...

Can I have a dealership buy back the vehicle or cover repairs through a shop?

Your question is not a legal question but mostly a recitation of mechanical issues with your truck. OK, so it is a POS. Can you get the...

How can I get a car title?

Welcome to America, stranger. You will find out that our used car dealers and presidents are the greatest. To answer your specific questions,...

If you paid a move-in fee but never signed a rental agreement or rent the unit, is it illegal for “landlord” to keep the fee ?

Call attorney David S. Morris in Chicago, he should be able to answer/handle this.

Who has to pay for this?

Not exactly a lemon law question, so outside of my minimal (very minimal) expertise to begin with, but did anyone make an insurance claim somewhere...

Selling puppies scam

What's "Cameron"? Sounds like a scam to me. Call the cops and make a report.