What could be wrong with my 2000 Ford Crown Victoria?

What could be wrong with my 2000 Ford Crown Victoria? - 1
Added (1). I have been dealing with overheating issues since I bought it used last year. Replaced the thermostat… It's not leaking anywhere. So I was at a light one day and all of a sudden it started steaming bad making a weird noise and now overheats VERY quickly. And someone said near my compressor a pulley was seized or something? Is it just the water pump more than likely? That's what I've been told by a few people. But the main question is if so do I need to just buy the water pump?

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