winter brings out the worst.....

I have a few questions for you people on here that are good with determining what sounds are what. When I turn my car on in the morning (30degrees out) my car makes the old shrieking car noise. I get this noise sometimes when I turn my steering wheel far. Power steering??? Anyways that goes away after 5 or 6 seconds. Then when my engine begins to get warm I hear a whistling noise coming from the other side of the firewall. I have a gut feeling this has something to do with the throttle body.... and one last noise... Sometimes when I accelerate I hear light knock knock...

Any help would be greatly appreciated.