Colleges in Delhi

The fee for NRI students is near about 7.5 lakhs per year in NIFT Delhi.

See it depends on your best 4 subject %. Not only on the basis of English marks i can tell you whether you will get a seat or not.

Prefer your course over college. All colleges are good. U will get perfect study environment. So take admission in any college which suits u. You can compare colleges using this tool
https://www.shiksha.com/resources/college-comparison.

It can be possible that college close their cutoff for next rounds as they got their required candidates but it is not necessary that in next round it will be same. Some students may get their seat upgraded or some may leave their seats due to some reasons and seats become vacant then again the cutoff will come for those seats in further rounds.

See when your rank is low, then only thing you can do it is to apply for it and wait & watch for the cutoff. Not every time but some time cutoff may go little low compared to last few years but it depends on various factors.

Yes, you can go for foreign language. Please check out the college website for more information.

No, you can include IP in your best of four, there won't be any deduction

Yes, you can do B.Ed after B.Tech.

No, you won't be eligible to apply in DU.