Engineering Entrance Exam

You can try!
As per 1st counseeling list, 50 score can get you in your 3rd-4th preferred branch. So, yes. You can try and get admission. Visit: www.thapar.edu.

Yes! Undoubtedly. Last year, at the end admissions were made open. Means, if a student hasn't filled thapar form, he/she can get admission in vacant branches. So, yes. Ofcourse. You can take admission. You don't need to wait for last round. You will get before that as per first counselling list. Visit www.thapar.edu for more information. Regards.

Honestly, no one leaves CSE branch seat. If there's any seat left, students from other branches will take it. As you haven't given JEE, there's a very little chance to get admission in a branch of your own choice.
But yes, last year, at the end, admission to Thapar was open to all. You could get a seat in the branches available at that time.
Usually, Electrical, Chemical, Mechanical, Civil have some seats left.
Rest, visit www.thapar.edu for more information.

Your rank in srmjee is very good. You can easily get every branch of engineering in the main campus of SRM University which is SRM - Kattankulanthur. But please select the branch of your interest only.

Since you have great percentage in 12th, I would suggest you to drop as you don't deserve an average college. Moreover, work hard for it throughout the year and believe that you can make it to that.
Hence, take a drop and work for it.

Last year, the least marks required to get into mechanical were 101 in JEE Mains.
Hence, explore different opportunities.

IEMJEE is only applicable for UEM Kolkata or UEM Jaipur.

Get into one of the NIT's or IIIT's and your life will be successfully with that, along with your hardwork of course.
Moreover, best coding colleges are NIT trichy, Warangal, Surathkal, Rourkela, NIT Jamshedpur, IIIT - D, (IIIT-A and IIIT-H are highly recommended ). and The supremes are IIT's if you can get into ( fingers crossed ) .