Mumbai

Some institutes in Mumbai for Ground Staff and Cabin Crew Training are as under :
1. Mumbai Avaition Academy & Hospitality Management, Kurla West
2. Costa Training Institute, Sanpada
3. Global Aviation Academy, Kharghar
4. Dgito Technical Training Service Pvt. Ltd. , Andheri East
5. NIITAPS, Thane West
6. Columbus Travel Academy Pvt. Ltd. , Vashi
7. Workopolis Aviation Academy, Andheri West
8. Concorde Aviation, Borivali West
9. DHJ World, Andheri West
10. Frankfinn Institute of Air Hostess Training, Ghatkopar East.

Hi Megha!
For affordable institutes of makeup and hair dressing, I think you should go for these institutes:
1) BHI Makeup and Hair Academy
2) Jharna Shah Makeup Academy
3) Marvie Ann Beck Academy of Makeup
4) LTA School of Makeup.

Dwarkadas J. Sanghvi College of Engineering
Shah & Anchor Kutchhi Engineering College
Rizvi College Of Engineering
St. Francis Institute of Technology
Mukesh Patel School of Technology Management & Engineering
Padmabhushan Vasantdada Patil Pratishthan's College of Engineering
Sardar Patel College of Engineering
Thadomal Shahani Engineering College
K. J. Somaiya College of Engineering
Reeti, these are the colleges which provide the computer science course with an affordable fee structure. Good luck.

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.