Water Pump

2000 Dodge Intrepid, 2.7, 6 cly, 2 wheel drive
118,000 miles.
Water temp gauge kept jumping up and down, checked water and reserve was empty, let engine cool, refilled water, drove 5 miles and it happended again. Had car towed home, checked oil no water,
when we drained oil, it had a strange color to it and smelled like gas, it was a creamy camel color, checked engine and no water, no cracks in hoses, no visible wear on belts, what could be wrong?