Indian Institute of Technology, Delhi

Below 1000 rank is required for admission in CSE branch in IIT-Delhi. Marks may be above 300.

You need to score more than 150 in order to get admission in any of the IITs.

Your marks should be around 300-320, means your rank should be under 150 in general category.

If you want CS in IIT Delhi then your rank should be under 200 for that you should get at least 300 marks in JEE Advance.
If you want mechanical, electrical, civil then closing rank would be around 800.
Although, there are various branches in IIT Delhi , so closing rank would around 3000-4000.

If you are a general candidate, then you should be under 200. For this, you should get at least 290-300 marks out of 372 in JEE Advance.

The fees for IITD is around 1.75 lacs for B.Tech but there are scholarships for the non-creamy layer of the society.

Yes, if you will get more than 8.5 GPA, then you can.

Yes, you can do PhD in finance from IITD DMS after your M.A economics from IGNOU. You are eligible for this.
Good luck.

Hi Aditi,
For getting a seat in IITs, you need to qualify JEE Advance.
You can get admission in private colleges like Amity University, Sharda University, Lovely Professional University, Galgotia University etc with this score in JEE Mains.
You can also predict other possible colleges here :
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best of luck.