Unfortunately I have some bad news for you. What you are describing is a blown headgasket, which is very serious and the vehicle should NOT be driven as further driving may very well cause the engine to seize completely. The head gaskets will need to be replaced and cylinder heads machined. In US dollars, this is a $4000 to $4500 repair, depending upon a shop's hourly labor rate.
For the brake alarm with all that has been replaced, the ECU may need to be reflashed to set the parameter correctly, but your major concern is the engine at this point with the blown headgaskets. I cannot emphasize it enough, do NOT drive it at this point. It needs to be towed to a repair facility
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