I have a Tomar Heliobe that I took off one of our old cruisers. How do I find out what model? Also, since I am retired I am going to use AC to power it but don't know which inverter/ amps. Any help would be appreciated.
Don't use an inverter in this application! An inverter takes DC as its input and makes AC as its its output.
Instead, use a power supply in this application. Specifically, use power supply that takes 110 volts AC as its input and makes about 13.8 volts DC as its output.