Definitely check the power steering fluid, it may be low. You may also have a bad wheel bearing, but it's hard to say without actually hearing the noise first hand.
This model had some issues with a vibrations from the power steering system, and an upgrade of the power steering hoses may need to be performed if you are getting a vibration when turning the wheel.
Have the diagnostic codes checked, these are stored when the check engine light comes on, if you post the codes here I can give you a good idea as to what is likely needed.
Get the radiator replaced, if the engine were to overheat, the engine can be damaged severely, costing thousands of $$ to repair.