M.Tech

Yes, you can but you will only get private college, and i would not suggest you to take admission in them. Prepare for gate this year as taking admission in IITs and NITs gives you so many benefits in addition to doing m.tech plus you get 12400 rs monthly from HRD ministry as a scholarship and place

Hello,
ICT is one of the best institutions of its type in the country. Yes, you can apply online for PG. In fact method for applying for PG and above is online only. I am attaching a link that will give you all the required information.
http://www.ictmumbai.edu.in/DisplayPage.aspx?page=ge&ItemID=5

You can go for M.Sc in food technology after completing B.Sc. In food and nutrition because for M.Tech, you need to have B.Tech or BE degree.

Ansal University, Gurgaon
M.Tech. In Engineering (Part Time)
PG Degree|Part Time - Classroom|Duration - 3 years
Total Fee
INR 2.30 Lacs.

First of all, you have to take admission in B.Tech through lateral entry. After that, you have to clear GATE with good score after B.Tech after that, you can get M.Tech in IIT through GATE.

Yes, for that, you should have to search college and apply for that. If your Bachelor college is NBA, you can get a study visa for study in Canada.