The ISMACS site {
http://www.ismacs.net/singer_sewing_...-database.html } shows your serial number to be a Singer 127. It was 1 of 50,000 allotted August 28, 1919.
The belt, bobbins, some screws, and a few other parts are available at Sew-Classics. Many of us recommend Tri-Flow oil rather than other sewing machine oils. It's also available at Sew-Classics.
The gold "paint" is / was actually a decal. The paint is not so much a paint but a Japan finish. Go to Skips thread here:
{
http://www.quiltingboard.com/vintage...s-t186522.html } to read about it.
Do not use abrasives, or strong chemical cleaners on the surface as the original paint and decals were once covered with shellac and that is long gone. There is no protection to what is left.
Use cotton balls or a very soft cloth and oil to clean the machine exterior. For the interior you might need to use denatured alcohol or a solvent such as Hoppe's #9 to clean it.
The 127 I have was so caked with old oil the only thing that would touch it was the gun cleaning solvent. Took me quite a while to get it clean enough to actually use it.
Here is a thread I did about it: {
http://www.quiltingboard.com/vintage...ml#post5673486 }
I'd start by oiling everything that moves or is supposed to move with Tri-Flow. Then go from there.
Joe