Exam

Yes, for sure.
You can get private colleges. To have more no. of colleges and universities you can check JoSSA’s website and check out the last year’s opening and closing of CSE ranks and get the approximate overview that which one would be best suited for you.

Please do not drop, that's a suggestion. Join any educational programme and prepare simultaneously. If you are really patient, then wait for the vacancies as offered by NLUs, you might easily get through one of the bottom NLUs.

The cut-off would be something within 50 percent of the total marks you appear for, in the exam. It might even go down to something around 45 per cent, at max.
Do not worry about that, just do well and concentrate on the paper during the exam rather than worrying about the cut-off.

If this 19k is your general rank, then you will easily get IIIT
but if 19k is your OBC rank, then I am sorry to say but it will not help you to get into IIITs because your rank in OBC category is 19k, so your general rank is somewhere in 1 lakhs.

Sorry to say but with 264000 rank in JEE Mains, there is no college available for you that can give admission on the basis of JEE Mains rank.

You have got a decent score, so you might wait for the vacancies in the national law schools or join some good private college.
By the way, what is your CLAT rank?

You are not eligible for JEE Advanced as you require minimum 75% for getting admission in IITs and NITs. You need to prepare very hard for JEE Mains as it is the only way for you to get admission in the best colleges of India. Good luck.

Check out the official TS EAMCET site where in you can get the opening and closing ranks of all state engineering colleges and also a few college predictor like Shiksha's college predictor.
Good luck.

Yes, you might get through easily.
Good luck.

You will have to register for admission 2017-19 process as your result will be displayed in next academic year along with MAT try to give other exams like CAT(min 85%-max99.99%) Maharashtra MBA CET(95%+) ATMA(99.9%) all this scores mentioned are to get in reputed colleges so good luck and in case of