Hello Bhavya !!

For cracking medical exams like NEET , AIIMS,JIPMER you should be well thorough with the NCERT books for all the three subjects.

The AIIMS question paper is usually difficult than the rest but can be solved with proper practice and a little bit of extra knowledge on all the three subjects a apart from what is in NCERT.

For Biology 'Trueman' is a very good choice but keep in mind that there is lot of extra topics covered in the book which will not be any use in this stage . Therefore , be selective in studying the topics .

For both Physics and Chemistry 'NCERT at Fingertips ' is really a good book with lots of questions including diagram questions and HOTS.

Therfore , this set of books will be enough for preparing for AIIMS.

The coaching material depends upon the coaching you are going to . Most of the coaching centres provide pretty good study material.

All the best.

Hope this helps .