There should be a lot of places you can get instructions by googling kodak folding camera no. 2 manual. Are you sure, however, that it takes 120 film and not 620? Kodak launched 620 film I think in the early thirties, same size film stock as 120 but on a smaller spool with a thinner post, the idea being to allow cameras to be a little more compact. Perish the thought that they might want to create a captive market for a film they made by then manufacturing cameras that took only 620! If you try to force a roll of 120 into a 620 camera, it'll jam it up but good. That said, the Kodak folder should give pretty good images, probably in a 6x9cm format -- big honkin' rectangles! If you're having someone else process it, note that the corner photo shop may not be able to print from a 6x9 negative. I had some 6x7 that I had to have printed by a pro lab in town because the place I usually take my MF stuff only has a 6x6 frame.
If you can get it open, you should be able to see for yourself how to load it. Just move the empty spool over and wind away. There should be a red window in the back -- MF film has frame numbers printed on the paper backing.
If you need to use 620 film, there are quite a few places online that sell it -- check J & C for a wide range of vintage-style films, including orthochromatic and high-silver-content B&W, all at affordable prices.
As for bulb, look to see if there's a threaded tripod socket. Some of these old models actually had two of them.
In any event, make sure the bellows are light-tight: take it into a dark room, open out the bellows, open the back and shine a small flashlight into the bellows. Any pinholes, worn-through corners, tears, etc., will show up this way.
