First, worry about the inside of the car. If the shifter is broken, then you have to replace it. But everything else you can fix.
When your done, the car should look like this. Now the engine...
This is the engine if it is the worst condition. Now for an 85, chances are, your spark plugs are going to be loose so tighten them up and then try to replace the coolant. Or Maybe even the radiator.
This is the engine brand new. I hope you enjoyed this and if you have a 1985 Chevrolet Camaro...go try this process and you will have a brand new car by the end of the year. Drive responsibly.
The creator of this guide has not included tools
I live in Maine.