Possible to make it colorful and more structured for multiple parts?

Not at the moment.

Bump! This would be very helpful for making the info more legible.

how could I add clickable buttons on status bar ?

You can’t.

Your only option is to extend the indent and encoding menus that open when you click those areas, but I’m sure that’s not what you are looking for.

which areas are you mentioning here where we can add custom menu or buttons

http://docs.sublimetext.info/en/latest/customization/menus.html