IIT

You have to clear JEE Mains followed by JEE Advanced, provided you satisfy the eligibility criteria of JEE.

You can download your admit card from JEE official website.

Hello Dheeru,
There are different types of eligibility criteria. One talks about the year in which you have passed your 12th. In your case, it's ok. Other criteria is the date of birth. Now, for this, visit the website and you will come to know if you are eligible or not.

Minimum 110 marks are required.

Hi,
Following are the government colleges for the same:
DTU
NSIT
IIIT-D
IGDTUW
JMI
AMU
GB Pant
USIT

Placements do not depend on your 10th and 12th performance. They depend on your 4 year's performance in B.Tech, your knowledge and the number of projects you actively participated in.

You may pursue the same only after completing maths of 10+2 level if you have not studied maths at BCA level, for this you may opt NIOS on demand exam.

It depends from person to person. I personally believe that you should definitely drop for JEE. You know you are afraid that you may lower your marks, which has a very low probability of happening. But if you drop and do well next year, you could easily pursue CSE, which you have always wanted to. And let me tell you, my friend, if you give your 100% next year, you shall get CS. You just can't let your fear stop you from trying. If now you let your fear stop you, then you are in a big trouble. Don't even think about marks, just go study.

Fresh Aeronautical Engineers from IITs can get starting salary of Rs 6 to 12 Lakhs per annum in India depending on the type of company. Salaries in Western developed countries will vary between 60K USD to 100K USD per annum. Some brilliant students who have written and published technical papers may get higher salaries in countries like USA or Germany.