I would by doing a lot of research on the instrument or get advice on the instrument. You can also save money to buy one.
You could buy an ancient brass instrument from an antiques dealer or perhaps even on eBay.
you can buy various sizes of bunkaka depending on its wooden c
Instrument shops.
You don't need to!
a recorder
eBay or most musical instrument shops
a drum
Buy a knew recorder
The shehnai is not a drone instrument, although there is a drone for the instrument. It is very difficult to find so if you are buying online buy the carnatic ottu drone.
Online or a instrument store or cragslist or ebay.
It is more cost effective to buy the entire set together. If you don't plan on playing every instrument, consider buying them separately.