Requirements of own cryptocurrency? What are the requirements and technologies I need for creating my own cryptocurrency?

How to assign value for my own coin?

For example:


1 bitcoin  = 279627.91 INR,
1 Litecoin = 2863.13 INR
You will need a lot of experience and knowledge in many areas including cryptography, networking, programming, economics, and a lot of research into cryptocurrencies themselves before you'll be able to make one yourself. 

Values are not assigned by the developers, just by the market, it is supply and demand which raises and lowers the price.