Jae, I really don't know a lot since I am a Singer enthusiast. My neighbors had New Home, and they were great. We didn't have them because we had no electricity. (lol) I do know that they were very powerful and quiet. She sewed for 12 children on the little machine. There isn't a whole lot of info on them. I see that another member is very kindly copying the manual for sharing, so that is a real nice thing to have. Another member has given you some advice on finding needles. Not for sure but I know that Organ Needle company sells New Home/Janome needles but not sure if they have them in this length.
Here is some history from Alex Askarov (sp?)
http://www.sewalot.com/new%20home%20...%20machine.htm
It is only history but the old photos are really cool.
I have a Singer 127 and a 66, both treadle. One is the Memphis pattern and the other a Red Eye.