The head gasket(s) are bad and need replacement. It probably was damaged from the anti-freeze not being changed.
With the mileage on it, you should also do the timing chains.
There is not other way to fix it and driving it will only cause more problems and lead to a complete engine re-build and that engine is expensive to rebuild.
For now, change the oil and anti-freeze and take it to a reputable repair shop near you and get an estimate. You can use the search engine on this site to find a repair facility NEAR you. Just search and look at links and ADs on the page for links.
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Monday, March 26th, 2012 AT 9:48 PM