In general, the down payment remains in between 20-30% of the on-road price of the vehicle and ROI varies between 9.25-11.5% and it totally depends on the CIBIL/Credit score of an individual. So, we'd suggest you walk into the nearest dealership to know the final finance quotation and documentation as they will be the better people to assist you. You can click on the following link to see the details of the nearest dealership and selecting your city accordingly – Car Showrooms.
The after-sales service would totally depend on the availability of a service center in your city. And for the availability and price of spare parts, we would suggest you to get in touch with the authorized service center. Moreover, as of now, there is no official information available regarding the discontinuation of the car so we would suggest you to stay tuned for updates.