Hello Gloria,
If you do not have oil holes on the machine take the top off if you can and put a few squirts of WD40 on every moving part, open the faceplate and put just a few drops on all moving parts, take the bottom off and do the same, take pout the bobbin case and wipe some oil in the raceway area do not spray it otherwise you will get oil on your fabric.
Ken
drivewithken@blueyonder.co.uk, December 2007