M.Sc

No. Since doing M.Sc has no relevance with any Doctorate degree, you cannot be addressed as "Doctor". In India, only a person who has completed any doctoral academic, is given the Salutation of a "Doctor" when awarded with a PhD.

Here is the link you can refer to see the best colleges found as per your requirement. You can even filter your search according to the location you need- collegehttps://www.shiksha.com/it-software/networking-hardware-security/colleges/cyber-security-colleges-india?sp[]=127&rf=filters&ed[]=et_21::dm_34&uaf[]=et_dm.

Yes, you are completely eligible for it. But some universities have different rules so you will have to check from Admission office of your university.

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Yes, you can. If you want to do your M.Sc. In radiology, the minimum criteria is 10+2 qualification with Physics, Chemistry, Math and Biology with a minimum aggregate score of 40% to 60%.

Hi, Please refer to the link below:https://www.shiksha.com/university/panjab-university/pu-cet-pg-exam?course=1039.

M.Sc nutrition and food technology Eligibility-
The candidates should complete their B.Sc. degree under any registered University with subjects like Physics, Botany, Zoology, Chemistry, Biochemistry, Biology and Microbiology.
B.Sc. (Family & Community Sciences) with specialization in Nutrition.
B.Sc. (Vocational) with Specialization in Food Science and Quality Control or Clinical Nutrition & Dietetics or Food Science and Technology or B.Tech. Food Science and Technology.
B.Sc. (Family and Community Sciences) Programme with specialization in Foods & Nutrition/Public Health Nutrition/Dietetics/Food Science and Quality Control.

You can refer https://www.shiksha.com/science/cucet-exam-question-papers

No, it's not necessary to have maths in intermediate in order to pursue your desired subject.