Engineering

If you want direct admission in any private college, then you can directly visit and you will get admission in any private college. But if you want admission in any government college, then you have to crack the entrance exam.

Yes, you can take admission in that college.

Yes, you are eligible for CNC and Polytechnic too after ITI. You can apply for any polytechnic college.

No, it's not necessary but it would be better for you if you have a laptop.

Yes, you can get admission in MMM for CSE or mechanical.

Yes, after 12th, you are eligible for lateral entry means direct admission in the second year, but you have to crack the entrance exam with a good rank because every branch has only 6 seats in the second year for lateral entry.

At this rank, you'll get good colleges. I am listing some colleges; please do check the list below:
RVS College of Engineering and Technology, Jamshedpur
ICFAI University, Jharkhand
University College of Engineering and Technology, Vinoba Have University, Hazaribagh
Cambridge Institute of Technology, Ra

If he has a less than 50%, then he can't get admission in this college. His marks should be more than 50% and also he has to crack JEE Mains for this college.

According to me, it all depends on your interests. Whatever you do, if you have the passion then you can easily get success. Moreover, in petroleum engineering, the scope in India is very less. So my advice is not to do petroleum engineering. But if you have great interests in it then you should go

Wait for the result of first counselling round.