Something tells me that you probably have a pretty valuable antique on your hands. It is beautiful. I would take it to a machine cleaning store to do the inside, but treat the outside very gently. I'm sure they could help you get a manual and tell you where to get the right needles, etc. for it. My MIL had an old treadle machine and told me that I could have it when she passed on, but my SIL took it. I was really disappointed because she doesn't even sew and I don't think she really appeciated what she got. Probably sold it. Never the less, I taught both my daughters to sew and made sure they both got a sewing machine when they married. My youngest girl now is an absolute expert; makes a lot of her clothes, does beautiful machine embroidery, has started quilting and just purchased her first wool felting machine. She has also made a few gorgeous heirloom christening gowns for her co-workers. Well enough bragging for now, wish you good luck with your new treasure.