Diploma

It depends from college to college. Modern universities do accept 10+3 for non-technical programs. However, the same could not be said for government universities/ colleges. You can take admission in almost all top ranking private universities in India.
Below mentioned universities are accepting 10 + 3 format:
1. Symbiosis.
2. Christ.
3. LPU.
4. Amity.
5. Amrita.
6. Manipal.

Hi Benhur,
Every program and college have different admission criteria. After completing class 12th, you can apply for Bachelor's degree programs. Basis your grades, you may get into a top university. All international applicants must take the IELTS, therefore you must give it too. The application process is online, you will find details on the website itself.

You can pursue BBA, BBS or BMS after completing your Diploma. You cannot opt for any Master's degree.

SAP MM course is specifically designed for material management and is highly sought after by companies in metallurgy, automobiles and manufacturing industry.

Hi,
For HM course, you will have to clear NCHM exam, which is a national level exam. The forms are out for this session. You should have 50% in your graduation to apply for this exam.
Good luck.

Hi,
Yes, this is legal that you can do two different courses from two different universities in different mode. But, you should consider your time management for your studies.
All the best.

You can pursue mass media course. It has got a lot of scope.

No, to pursue a Master's degree, you need to have a Bachelor's degree at least of 3 years duration.