College Laptop

I am not quite tech-savvy but will try and answer the questions and list my needs. Please help.
Thank You.

1_What is your budget?
Rs. 40000 / $830
2_How much screen size do you need?
15-17 inches
3_How much screen resolution do you want?
Don't really know
4_Do you need a portable or desktop replacement laptop?
A portable Laptop
5_How much battery life do you need?
Again, Don't know exactly how much
6_Do you want to play games with it? If so then what kind of settings you want to play your games?(Low,Medium or High)?
I love playing Counterstrike with highest resolutions
7_What other tasks do you want to with your laptop?
Music, Internet, Gaming, Movie Viewing, High storage, A fast system overall.
8_How much storage(H.D.D Capacity)do you need?
don't know exactly but loads. (for music and movie storage capacity; also college-related files[finance major])
9_If you just want to buy from some sites that you like,please post the link of them.
You tell me.
10_How long do you want to keep your laptop?
about 3-4 years minimum.
11_If you like to mention some other things,please post them too.
I will be buying a laptop for the first time so I don't really know the technical aspects of my requirements. I tried to list in everything I know.

Thank You Again.