That's a nice Singer 27 with the Sphinx decals. I've got Judy's sister at my place! For cleaning the body I highly recommend an automotive upholstery cleaner called "TuffStuff". I got it at a car parts place. It is wonderful, very gentle, did not discolor the decals at all, and yet removed the huge amount of gunk that was on the one I had. I started out using oil, but I would still be cleaning if I had kept that up! For the wood, it doesn't look like the veneer is in bad shape. Go to your local hardware store and look at the furniture restoring products. I like the Howard products.
You might want to go check out the TreadleOn site:
http://www.treadleon.net Great information about old machines and how to repair and restore them.
Pam