You break a bone, specifically the ankle, and it has to be set in place (closed reduction). Will you need anesthesia?

Yes. Your ankle bones will be repositioned. It is painful and for surgeon it is faster and easier to do closed reduction when you are relaxed.
Yes. The reduction of an ankle fracture will be a most unpleasant experience without anesthesia.
Yes. This could vary from sedation to a full general anesthetic. However, you will appreciate the medications because the procedure is painful.