Vintage German Adler 87 Sewing Machine

Here is a vintage Adler 87 sewing machine. We plugged it in and the motor runs and the needle moves up and down. NOTE: The band is old and loose. The light bulb does not light up. We aren't sure if it needs replaced or if it is an issue with the switch. There is tape on the cord to the light. It could use a good cleaning. It will certainly need oiled, and would benefit from a professional servicing. There is no foot pedal, so when you plug it in, it just runs constantly.