Kathleen,
The Japanese machines like this are pretty stout machines. Pull off the top, usually two screws and oil everything that moves or looks like it should move. "Gently" move all the controls as you do the oiling, don't force anything. Make sure the underside is clean and oiled as well.
I recommend Tri-FLow oil.
The motor
may have a small hole on each end just above the end bushings for oil, if so give it a couple drops of oil, but not too much. Then release the stop motion knob and run the motor a full speed till it cleans itself out. You'll hear the motor sound change as the oil and debris burn off of the commutator.
It is fairly common for them to smoke a bit when first run after sitting a while.
I use regular sewing machine or small motor oil in motors.
For a manual you might try: {
http://sewusa.com/index.htm } or {
http://www.tias.com/stores/relics/ }
Joe