I have installed skinr module. In that there is an option to select Template Files.
I don’t have idea how to implement it.
1. How Should i need to create a template file for this?
2. Where it should be saved?
3. How it will get the template file by default?
4. How can this be achieved?
Here is the screenshot below.. Thanks in advance…

You have to define the template in the .info file of your theme.
If you read this article first, then I think that the instructions here are easy to understand