Hey
Thanks for contacting career360.
For every student its different since there are criteria.
And below is link which make you clear about all your doubts
.https://www.jeeadv.ac.in/Eligibility-Criteria.html

There is no such exact cut off for IITs as Jee advanced paper pattern changes every year but to get a rough idea about required rank you can go through the previous year cut off trend -

https://engineering.careers360.com/articles/jee-advanced-cutoff

Good Luck!!!