I'll get some pics up, I'll have to put them on my computer.
To answer your questions:
1. it seems to fit a standard needle. I compared the one that came on it to the modern one with a flat side, looks the same. The "original" is pretty rusty, so I can't read any markings on it.
2. It only fits one way. Tried to fit another direction, and that doesn't work.
3. It's threaded to the best of my knowledge. I don't have a manual, and it's been like pulling teeth to find one, lol.
4. I have completely cleaned out/wiped down/oiled everything. It was pretty dusty and stiff when I got it, but now it treadles great. Just doesn't sew.
The manufacture name stamped on it is AG Mason MFG CO, Cleveland, OH USA. There is a serial number, but very worn and hard to read. The name painted on it is Improved New Wilson. Nice looking machine, I just can't find anything about it. So pretty much ANY type of help is welcomed.
Thanks everyone, and I'll get some pictures up.