How much I have to score in JEE mains to get a best college and after that how much will I earn if I will complete IIT from Delhi?

The cutoffs is different of every college and also varies from branch to branch. But in general if you want to get admision into top NITS then you need to score more than 275 marks as a general candidate. Moreover to get into IITS you need to first clear mains then should have a good rank in advance.

In IITs you get an average package of 7-8 lkhs per annum. But that too depend upon the knowledge you have in your stream.
Hope it helps.
Thank you.

Hi
To get best college(IIITH) you have to get 99.8 percentile
To get Into top nits with top nits:  99.2
To get into top nits by compromising your branch: 98.8
To get into any nit: above 98

The package depends on  the person, it varies from above 1 crore  to even jobless if your  luck runs out.