Hey Kiran
Please mention the college or university you want .
And for entrance you should check out its previous year exams and its pattern and see what type of questions were asked .
Generally all entrance can be covered from the JEE mains books and study material.
And try to practice that type of questions but first you should prepare with all the concepts from NCERT .
So good luck.

Hi Aspirant,
For all engineering entrance examinations,you must go through your 11th and 12th syllabus properly.
Go through the theory part first.After that,use prescribed books to solve many questions.
The topics in which you're weak in,take time to go through them again.Also,do not be overconfident about certain topics.Plan properly and devote time to study,especially problem solving.
Hope this helps.