Dear candidate

It looks like you put a statement on your question instead asking a question so, it looks like your question is incomplete so, if you can mention your question completely and specify what you wanted to know about clearly then only I can help you with the Information you need but according to your question the eligibility criteria for getting into IIT is you need to have minimum percent marks in intermediate board examination  and another one is you need to have a valid score in JEE ADVANCED and for writing JEE ADVANCED you need to write JEE MAINS and qualify and should be in top 2.5 lack students in JEE MAINS then only you will be eligible to write JEE ADVANCED and you should get a good rank in JEE ADVANCED then only you will be able to get a IIT depending on the particular branch of a particular IIT cutoff rank.

Visit the below mentioned link for more Information about JEE ADVANCED eligibility criteria

https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria

Hope this Information is helpful