Thanks for the responses!! The switches are old o72 and o22. The transformer for the trains is a KW 190 watt. I know I can run everything off this but was just trying not draw everything from it. I have an old 1033 I was gonna power the switches with.
which leads my next question, I ran the meter on the terminals on the 1033, but what terminal is the common, that would be paired with the (U) on the KW? Thanks for all your help!