Is it okay to buy a cycle from a new brand?
At this price category new brands are created all the time and badged onto generic Chinese bikes. There is next to no difference with regard to quality between brands. While 16k rupees (about 200 £|€|$) may be a lot of money in India, it is still a bit below the costs of a bike of reliable quality.

Shimano tourney components are a good sign in an inexpensive bike. However, there will be cost savings in other parts, like cranks, pedals, bearings, and brakes. For example, the pedal threads and square taper interface of cheap cranks tend wear out and fail quickly. Pedal and head set bearings seize or get loose.

This is not necessarily the case for your bike. If sales margins are low, the bike isn't necessarily a dreaded 'BSO' (bicycle shaped object). Yet, learn how to identify one: 
[BSO identification for amateurs
[Is KCP a trustable bicycles Brand?

Unfortunately I cannot recommend how to get a better bike for not much more in India. Where I live a decent and simple one costs about 2 times as much. There is a large market for used bikes of good quality that cost about as much as the bikes you posted.

You might want to search for India on bicycles [SE] we had a number of similar questions.