I would not recommend the old CAB1 and TMCC PowerMaster for a simple reason. It's an unsupported product, and it doesn't have nearly the capability of the Legacy PowerMaster and command system. You can reduce the cost somewhat by buying the BASE1L/CAB1L (aka Legacy Lite). system and the Legacy PowerMaster.
The TPC doesn't control switches, and it does require at least the TMCC Command system. The boxes for controlling switches and/or accessories from the remote are either the SC2 or ASC, also requiring a minimum of a TMCC Command system.