It is very possible that the radio, speedometer dial, fuel gauge and the clock that are on the dashboard are nor more working. The clock, which is likely not digital, worked for some few minutes after the car left the showroom and then stopped. For some reason, modern science can put a man on the moon but cannot get a clock to work in the car.
To wire the clock and the radio might require basic knowledge of electronics. You will have to replace the wires that power both of them. The radio can be disassembled and all the faulty parts replaced. This can also be done for the clock. There are several books on how to make a radio and a clock and most electronic shops have components for them. It may take some time and skill to get the clock to stat working, but the radio should not pose a problem.
Classic cars usually come with crank up windows, push out “fly windows” and manual seats that have to be pushed forward by pulling a lever. Unlike cars turned out today, there are no “power” windows that operate automatically or power seats that work with the push of a button.
Most of the electronic equipment in the vintage cars consist of a radio, clock and lights. To get any of these things to start work, you need some knowledge about electronics.
A shop like Radio Shack has all you need to get your vintage radio to work again. The staff there also know there onions. If you take your radio there, they can help you find the parts you might need.