Here is a great site for info on cleaning old sewing machines.
Be very careful not to rub off the decals..and dont use harsh solution to clean it, but using the info on this site, you should be able to get this machine clean and running smoothly all by yourself.
My friend and I rescue old machines and restore them to sewing condition. This you can do, too.
http://www.treadleon.net/sewingmachi...gmachines.html