I have my Grandmother's Free No. 5 treadle. I downloaded the manual from the ISMACs website. Whenever I oil the machine I get out the manual to make sure I get all of the places. There is also a wick for keeping the shuttle oiled.
The Free no 5 uses regular needles. I was lucky and got a belt and extra bobbins at my local sewing machine store. It helps to know the local repairmen.
Boyle made replacement shuttles for the machine.