Yes
Yes
The check engine light sets a code for diagnostics and you need a code reader. Most auto parts stores sell code readers and most will check the codes for free.
Your local Chevrolet dealer or auto parts store can sell you a remanufactured engine or you can check your local salvage yard for a used engine.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.You need to sell the car, you will go broke trying to keep the check engine light off on a VW, I am speaking from experience.
Does the check light come on when you crank the starter. If not you probably have a bad or missing bulb. It is common for people to remove the bulb to sell a car.
go to auto zone or a shop of the sort. they have and sell readers there that will tell you the code and the problem.
You would need to check the information on eBay motors for selling policies for what you want to do.
New engine? Dealer. Used engine? Salvage yard. There are also some places that sell rebuilt engines. A Google search is in order.
If you are trying to sell the car and you just want the light out, you can disconnect the battery, but the light will come back on, maybe right away. The best thing to do is find out what's wrong. Have it checked out.
No, not really. IF -repeat- IF the real problem was only a loose gas cap, and it was then tightened down, the vehicle's own diagnostic system should sense that after a few miles and the warning light should go out. If it doesn't then you may have more than that simple problem and the dealer can use his shop computer to check and see what other problem(s) you may be having. Go to AutoZone. They can check the reason for free, and sell you the part (cheap) if it's something you can fix. Just went through this today. They can also reset the computer so the Check Engine light goes out.
A wholesale car dealer is a car dealer that cannot sell vehicles to the general public, and can sell only to other car dealers.
You'd have to either sell it to an FFL dealer, or sell it through an FFL dealer on consignment.