look inside the cabinet in the right hand corner. The foot control might be in a bracket on the side. It may be wired as a knee control.
A word of wisdom from one who has also been taken: Always try to move the hand wheel, check for a bobbin case and the power cords and foot control. If one of those 3 things are missing or not working I pass. Life is too short and sewing machines too plentiful. This does not apply to a Pfaff or a Bernina machine; even if they don't work, the parts have value.