There should be a control box and a pressure switch somewhere. The pressure switch should have contactors connected to 230V with a line going to the c-box. Apply power to the pressure switch, make sure the contactors are closed, and apply power to the c-box. If it pumps water, I'd say you're in business.
Be careful of electricity, if you don't know what you're doing, call a pro. Also I would keep your well on the down low, in some areas with city water they will make you plug and abandon any old wells.