Kathy,
The machine looks good to me. The plated parts are amber with old oil and could be cleaned to make them shiny.
As for the motor I don't know if that brand is still available or not, but as long as it runs good and you keep it clean and oiled don't be concerned about it. The cord block is a standard set up used by many brands other than Singer and Kenmore. Rather than use complicated wiring set ups they used one cord for the motor and one for the light and plugged them into the cord block.
The block is wired so the two outlets get power correctly. The light side is constant, the motor side is wired through the foot controller. All those look good in your pics.
What you didn't show is the cord. If the cord is pliable and not cracked, dry rotted or gummy and there is no bare spots, it's good to go. Keep your eyes open for bare wires and cracks down the road though.
The cord block is available from many sources as is motors, foot controllers and lights.
The 66 is a great machine,
I should know, I have 8 of them ...
Joe