My cholesterol is 220, my LDL 80, HDL 80, triglyderides 175. Do I need a statin?

Not necessarily. Assuming that you never had a heart attack, you don't need a statin. Your LDL and HDL are really optimal. Your tryglycerides are a bit high, but exercising and decreasing intake of refined sugars and loosing weight if you are overweight should help bring those down to good levels (below 150 mg/dl).
Depends. It all depends on your risk profile, your numbers are good, but there is more to statins then just numbers, for example it helps with plaque stabilization.
Probably. Your total cholesterol is slightly elevated. Your other indices are healthy, but you would probably benefit from one, as they do more than just lower your cholesterol.