Lizzie's videos are a great place to start. It sounds like you have a blacksided machine which is pretty cool.
You need the big spoked handwheel to retrofit to a hand crank. You can try here, ebay and other sources for a vintage hand crank. Sew-classic.com has reproduction cranks along with long bobbins and new spool pins if you need them. I think they may have reproduction hand wheels too. They may have other parts for your machine as well.
A good wipedown with sewing machine oil is the recommended treatment for cleaning. Oil everything that moves or looks like it should move. Take off the faceplate and clean and oil inside there. Do the same with the slide plates and needle plate. Remove any lint before oiling. The motor may or may not have grease tubes. Clean them out and refill with grease. Use only Singer motor lube or vaseline to grease it.
Singerco.com has free downloadable manuals for many machines. I'm not sure if yours is one of them but there is a good chance they have it.
I hope this helps and we love pictures.
Rodney