MCA

If you have interest, than you should go for this. But, my personal advice is that if you have good basic knowledge of programming and basic fundamental of computer than only go for MCA. Otherwise, you can look for another options like PGDM or MBA.

Not possible. I doubt if I am wrong. You have to get a Bachelors degree before you pursue your Masters.

Being in CS, MCA is a better option. This degree is equivalent to the B.Tech degree and hence give the equality of being an engineer. Also, the course content and plan in MCA is better suited with industry demands. If you want to be in IT, prefer MCA. If you want to be a part of teaching field, you can do M.Sc also. But not recommended from my side.

BE from CSE branch will provide you more job offers as compared to MCA. After BE, you can opt for job or go for further technical education through M.Tech. Many IT companies have BE from CSE branch as their first choice while recruiting.

You must do basic certifications like CCNA and Red Hat certifications. You can probably prefer to do MCA. This can give you better opportunities in the market being a Masters graduate.

It depends on what have you done in Bachelors degree and what was your stream in school?
Assuming you go for MCA, you should not target CCNA as it is the most basic level of certification. You will not gain any price in the market. If you look for CCNP, then it is a real game in knowledge and job. You will get better job, work, and salary. CCIE is the top class certification among all.

I don't think there is any MCA degree abroad. This notation is used in India. If you are interested for MS in computer sciences and related field, you can check:
1. RMIT.
2. University Technology Sydney.
3. QUT.
4. University of Waterloo.
5. University of British Columbia and
6. University of Toronto.