So the car was overheating... you parked it... did nothing to protect it for a year... you waited a year... didn't change any fluids... then turned it on and rev'd it to 6 grand?
*long tiraid Dr. Cox style about being stupid... something along the following lines..
Now that all of that is out of the way... on to being constructive-ish...
Now hopefully you didn't know better. Yes, replace the thermostat as well as EVERY FLUID in your car. Then and only then turn the key. In fact mail the key to me and take pictures of everything you do to the car. When you're done I'll mail you the key back. PM for address. Then if it still overheats check out your water pump, radiator, hoses, etc. In fact go ahead and check the hoses and see what kind of shape they are in at this point. I'm guessing not good.