Mumbai

Well there are a plethora of colleges affiliated to Mumbai University
Some of the best are
St Xavier's
HR
Jaihind
Mithibhai
And the list goes on
If you want to take admission for junior college or degree just go and visit the college you wish to join, but remember your choice is not enough to GET admission but also your merit. From the past few years admissions are online, so you will have to do it online.

Food technology being a matured branch in India where a startup would be the right idea in my opinion. Or else one can work in a food processing company at the outset and learn all design and operational aspects. Placement-wise, ICT is very popular.

There are a lot and lot of best colleges for PG Diploma in mass communication and journalism in Mumbai. For those. Check out the following links:
https://www.shiksha.com/mass-communication-media/colleges/m-a-colleges-Mumbai-all
https://www.shiksha.com/mass-communication-media/colleges/colleges-Mumbai

The top colleges for the same are:
1) Institute of Hospitality Management, Catering Technology and Applied Nutrition
2) Sheila Raheja Institute of Hotel Management
3) Rizvi College of Hotel Management
4) D.Y. Patil School of Hospitality and Tourism Studies.

There are many institutes in Mumbai, Maharashtra that offer Diploma courses in Hospitality. Some of them are:
La Sphere School of Hotel Management
Inspire Academy
Ice College of Hotel Management and Catering Technology
Blue Whale Academy

You can go for:
1) Yatin Dandekar Academy of Fine Arts and Fashion Photography
2) Udaan school of photography
3) Shari Academy of professional photography
4) JD Institute of Fashion Technology, Mumbai
5) Atharva School of Fashion and Arts
6) Lotus Beam school of Photography.

You should have passed HSC (Class 12th) examination of Maharashtra State Board of Secondary and Higher Secondary Education or its equivalent examination with subjects English, Physics, Chemistry and Biology/Mathematics and secured a minimum 50% marks i.e., not less than 150 marks out of 300 marks for general category and 45% marks i.e., not less than 135 marks out of 300 marks for Backward Class categories belonging only to Maharashtra State. Maximum of marks obtained in Biology/Mathematics shall be considered for the purpose of addition.
The chances of getting admission are less.

Well Swapna,
It's difficult to rejoin after a gap of almost 7 years as the maximum duration to complete any UG course is 7 years from the year of commencement of the course. You might have started the course in 2009 so 7 years means maximum by 2016.

Hi Harshit,
For all your admission related queries, you can visit this webpage:
https://www.shiksha.com/university/university-of-mumbai-fort-campus-856/admission

You will have to check the cut-off list of the colleges to see which colleges offer you the admission.