It's manufactured in India and carries the brand warranty. Yes, you can make calls with the help of Jio Sim.
Moto Z2 Play has protection against water. It comes with water repellent nano-coating.
You do not have to do anything special to avail Jio offer on Moto Z2 Play. Just when you start using the mobile, insert your Jio sim and it will get activated by the Jio company itself.
Yes, Moto Z2 Play does support VR glasses.
You will get one Style Mod free but you have to buy Camera mod, Battery mod, etc. if you want them.