Exam

In my knowledge, you can go for state colleges, such as Haryana which does not require JEE Mains number. But, otherwise there will be no colleges which won't require the JEE Mains application number.

The eligibility criteria for B.Tech in Textile Technology in DKTE Society's Textile & Engineering Institute is that the candidate should have passed 10+2 with science in any recognized board.
There is no use of JEE mains.

Yes, you are eligible. Do well in GD PI rounds.

ISAT entrance exam was conducted by Indian Institute of Space Science and Technology IIST for admissions to Bachelor of Technology (B.Tech) courses in various branches of engineering. Now, it takes admission through JEE Advanced exam. So, JEE Mains syllabus shall work on it. All the Best.

For your answer I am attaching the link of shiskha college predictor
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Exactly, I can't tell you that which college you will be getting. Since, all have different cutoff for admission.

You have to use the college predictor. It will give you an idea, about the college you will be getting based on your rank.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
It depends upon college to college closing rank for individual branches.

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=cconnect&utm_medium=CR_JEECP&utm_campaign=7476690
Just follow the link.

Yes, a few colleges like IIT, Kharagpur which offer 3 year LL.B courses consider LSAT score for admission.

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7476690
Just follow the link.