Are you applying for a masters program admission? That is the program that begins its application in November. I do not have enough information from you that can help me direct you towards a proper application but I will try to respond to the questions that you have provided.
1. What to include in CV.
Download the application packet from the website. It contains all of the information that will be required of your application including the contents or inclusive information for your CV.
2. What all things has to be done.
Again, download the application packet. Decide what you want to study as a masters student ( assuming that is the program you want to enter into) then look up all of the requirements on the website and within the application packet.
3. Do i have enough time? (application window opens in november)
Yes, you have enough time to apply provided that you can get all of the required documents and materials together by late September. Do not wait for the last minute rush, you might miss the deadline.
I have not any work done till now.
Studies in a college that is under top 50 nationally
The real question is, does your university meet the educational requirements of ETH-Zurich? There is an educational standard and qualification for the university that you are coming from. Your national and university standard tests must also meet certain requirements in order for your results to qualify. It must have equivalent credentials to that of a Swiss degree. If the university you come from does not meet these qualifications, if your education does not meet Zurich standards, then there is a high likelihood that you will not qualify for the scholarship.