Q. If we need sunroof for Renault Triber, then what we need to do?

You should contact Webasto Roof Systems, it is largest sunroof manufacturer in the World. They offer aftermarket services for fitting sunroof as per your requirement. They also provide sunroofs to Car Manufacturers like Porsche, Jaguar, Merc, etc. A Manual Sunroof is available at as low as 25K. and range of automatic may go upto 2 Lacs. Also soft top full length roofs are also available

If you need more tan you may go to the beach. If you need more dust and smoke inside the cabin you can open the windows. Aftermarket Sunroof sounds like a disaster on this vehicle. The sheetmetal used in this vehicle is extremely thin ( lower grade than any Maruti)!

Don't do this. It will hamper the car's body structure. If sunroof comes from company fitted that's ok. It's never hamper body structure also any leakage from sunroof.