"there is the piece missing though from the bobbin winder." do not cry about it. It can still be used. The missing arm slowly swings from side to side at the tread is being would to the bobbin. you can do it my hand if you choose.
Your shuttle and bobbins will look something like this..
Don't take that faceplate off until you are fully ready. it is a tricky one with parts that will fall off.