Degree

Hi,
If you want to do B.Tech then you can take admission in any good college. If you are working then some good colleges are also available for admission.

Master's degree would be a better option unless you have a company in mind which wants a PG Diploma graduate.

Hi,
It is not important to do B.Tech from America or Canada, the important thing is that the institute from where you have done your B.Tech is approved by the country or not.
Good luck.

It depends on your interest. Where do you see yourself in future? If you want to run a business organisation then go for MBA. Otherwise, if you have interest in teaching field or govt. jobs then you may go for M. Tech, but as per the current scenario, MBA has a better market value.

First of all, this is not possible as you can't pursue two courses at the same time and it makes no sense to pursue Diploma and degree course together.