Purchase a Chilton Auto Repair Manual, and follow the instructions. Remember to take your time and get all of the gaskets you will need to do the work. Head, Valve, Pleneum, and possibly the Exuast Maniflod Gaskets.
replace the head gasket
1700.00
Remove the head and replace the gasket. No other way to fix it.
Replace the head gasket. Yep.
ABOUT $1200
take off the head, replace gasket. reinstall head
possibly blown head gasket
take it to your local garage
Replacing the head gasket on any vehicle is a long and complicated process, however if you wish to see basic step-by-step instructions go to the related question on the right side of the page "How do you replace a head gasket?"
Intake & exhaust manifold must be removed. Then the head must be removed. head inspected for cracks or warping, and new head gasket installed. Not a repair for a novice.
You will need a new head gasket if you see engine coolant in the oil. I don't know about the thermostat.
Replacing the head gasket on any vehicle is a long and complicated process, however if you wish to see basic step-by-step instructions go to the related question on the right side of the page "How do you replace a head gasket?"