Well, a head gasket, or even two, and a belt, or even two, would run about a hundred dollars, or even two.
But first you have to know what parts you need.
You should have an expert opinion ...
... or even two.
If it costs more than my remaining balance on my car payment I’ll just trade it in. I like the XV Crosstrek (in orange) and the Foresters that are shaped like a brick.