Pull the plugs and change the oil, as so many others have said. I hydrolocked a 4X4 years ago and had the exact same symptom. Turn the key = click. Changed a starter and battery before I checked the oil on a fluke and it smelled like gas. ( float in carb had stuck open, gravity and siphoning effect caused the entire motor to be filled with gas, locking it up tight)
Just because I'm wrong doesn't mean your right.