How does it operate now? If it doesn't have a foot pedal, what makes it "go"? (I found the manual online, but it doesn't mention that part.)
Generally, the answer is yes, it can be made to work with a foot pedal. Usually there is a plug for the machine and two wires come out of it. One goes to the wall and one to the "go" mechanism. You can usually put another "go" mechanism in the place of the existing one.