According to the previous years cutoff for the college which depend on the basis of exam difficulty level and no. of seats available and marks vs rank comparison for jee main it would be around rank of 60000-90000 so according to that marks would be around 120 to 140.

Hello,You should aim for minimum 100+ marks in JEE mains.Since equal weightage is being given to  the subjects of physics, chemistry, maths - First focus on mastering a subject which you find relatively easier and then study the remaining two subjects parallelly. You should start working out problems in between your study hours along side. You can easily score good marks if you are strong in your basics for that be thorough with your 11 and 12th academics. Donot wait until you have finished your syllabus to start your mocks. Finally dont fret about your results and give your best in preparation.

Best of luck