Q: Car had jet engine and loud fan noises

My car started making a noise similar to a jet engine and had an extremely loud fan sound. It sounded like the car would blow up! When I got to the dealership, fortunately the engine had not overheated. If I had kept driving it surely would have been significant damage to the car’s engine! I was told it was a faulty water pump which had caused the wiring to burn out and they had seen an oil leakage near the engine. They told me that I have to replace the thermostat, water pump, plus the gasket and other parts. Before I tell them to go forward, do you agree with them and/or any advice?