Raj If you have any original painted parts to compare the colour, that's fine. If not a trip to your local Supermarket Car Park will give you literally hundreds of poly golds to choose. When you are happy with a particular colour take the details of the car make and model or your original painted part to your local bodyshop, or Auto Paint Supplier. They have colour swatches available so you can chose the precise colour. Then you can get them to mix for you.
You will never replicate the true factory colour, in fact the colour shade in production was rumoured to change by the day as successive differing batches were added to the paint storage vessels. Polycolours of this early type were in the hands of the sprayers, and because the final shade depended on the opacity of the top coat, two different sprayers would produce two different shades, depending on how heavy they were laying it on.
In the early 1970's the nearest off the shelf colours we used were Ford Saturn or Amber Gold, very popular on MK2 Cortina's and early Capri's and so easily available then....
Once happy with the colour, the paint type choice is down to good old homespray cellulose, if available, or professionally applied Poisonous Two Pack. It all depends how much you want to spend. There is a lot to be said for plain black. Rattle cans, either stock colour or custom filled acrylic will be expensive and getting a perfect finish all over with a can is difficult.
Swarfy.