Your machine does not appear to have many parts missing. Can you open the slide that has the serial # on it. pull it towards the operator. There should be a shuttle and a bobbin in it, though you may have to turn the hand wheel to see them. Don't get aggressive pulling it out. There is a piece called the pitman arm between the big wheel underneath to the rocker pedal that your feet rest on. They are a bit fragile and can be broken If they are wood. Easy to make another one though. Shuttle and bobbin look like this.