Good for you on getting it going. I quit trying to buy new years ago and look for old stuff. I usually take apart,clean ,paint and use. I can't get the quality I want today in new. Anyway I have restored a lot of stuff. Most of the stuff found in "basement workshops " just needs cleaning and new cords. As far as it not turning good thats normal on some stuff. You have a tool not used in years the oil and grease will harden. All the info above is good and par for the course for what I do. I also use brake drum cleaner on metal parts I can. It cleans really well. Keep it away from motors,gaskets and such.
Belts are easy to find, tractor supply,local hardware stores,parts stores. If its together just take it with you. Most of the stuff I have restored uses V belts so notice the shape as well. As far as making parts I have made a lot of parts of well. So do it if you can't find one. If you need any info check out owwm.org or owwm.com, I think they use both. They have all kinds of stuff there,old manuals,photos and the such. Its a good site, but like any there are a few oddballs there. I got tired of one and quit posting. They also have a place on there to buy or sell. You could post a description or picture of the part you need. There are people there that restore them and have a lot of parts.
As far as oil check on the site as well. They have info on that. I use a kholer type oil for their engines. I don't remember the weight of it. Anyway good luck. Most people appreciate the old stuff due to how well they are made.
Some of my rebuilds are at the link
http://community.webshots.com/user/willy3486
I have pictures of a old walker turner drill I rebuilt, I had to make parts for the deck of it to hold it. I also have a old scroll saw I redone as well,I made parts for it as well. There is also the metal lathe I redid there. And other tools are in my shop I have redone or waiting to be redone.