Namaste,
Starting a COUPON WEBSITE is not an easy task. It requires a high level of technical knowledge and you have to stay tuned to current updates also.
To make a Coupon Website, you must have the following:
Make a custom Website
Learn about Digital Marketing and Affiliate Marketing also.
Learn about the Companies who offer Affiliate programs in India(Vcommission, and many more)
Read out the complete Terms & Conditions before dealing with Affiliate Companies.
Register a niche Domain name of your website
Make a technical team, marketing team
Take a SSL Certificate and other payment options(Payoneer, Paypal)
This much is sufficient for starting a Coupon Website. Be careful. I hope your doubts is cleared.
If you have any questions, then feel free to connect with me.
Regards
KnowDeepak