[Anker]

A few suggestions:

Check that there isn't intermix. Either oil in the coolant or coolant in the oil.

Check the brakes thoroughly. You don't want to start driving a car with corroded brake lines or other potentially serious brake problems.

Get a decent code reader that can read the Porsche proprietary codes and read all codes. Fix any problem they indicate.

Make sure there isn't rodent damage. Look for nests and if you find one, look for chewed cables.

Good luck!