Colleges in Pune

Hello,
Any individual who has cleared his 10+2 with Physics, Chemistry and Mathematics (PCM) from a recognised board or institution like CBSE, state board or NIOS is eligible to opt for B.Tech mechanical engineering.
Good luck.

With regards to the 1st question, one can always call ILS and understand or just pay a visit to ILS.
Diploma is a residential course.
For the 2nd question, no education goes waste, is all that I can say. Whether it is useful or not is a personal prerogative, given the career choices one has.

The website (https://ilslaw.edu/) is the best place is the best to get most information. As regards to admission in ILS, it is now through MHTCET for LL.B and B.A. LL.B., while admission for LL.M. is managed by ILS under the guidelines of Savitribai Phule Pune University. The MHTCET form is available online on their website.

Being a B.A.LL.B. candidate, I cannot answer with confidence about LL.M., and I do not want to misguide.
As regards to the notification, a merit list has been published on the ILS website at:
https://ilslaw.edu/announcement/first-merit-list-for-llm-first-year-2018-19/

It depends on factors like whether you are interested in the 5-year course or the 3-year course, outside or within Maharashtra, open or SC, ST, OBC, NT or ex-serviceman. Last year, i.e. academic year 2017-18, the cutoff for 5-year law course, outside Maharashtra (Open) was 107. This is also the highest cutoff, as for all the other categories, the cutoff was lesser.

It depends upon college/university. Sometimes, they allow doing same, if one has genuine reason for a 1-year drop or any other. So, try consulting college/university administration. They can surely help you out.
Best of luck.

Follow the official website below for all the details :
http://zcoer.in/fee-structure/