I have a Buddha mold and a similar Buddha statue from my grandfathers heritage as much as I know he was acquired in Afghanistan or Pakistan in the 80s with a few other items.
What you have is a Indian ''set'' of a ceramic buddha and the mould it came from. You would be surprised to hear I see them more. Not particularly rare but even so a lovely possession. I date the 'set' late 19th century so around 150 years old. These small buddha's were used in house altars or brought with a person when traveling. They were, as said before, quite common. Nevertheless if you would bring this to auction I would expect to fetch a price in the estimate I gave above,