Mechanical Engineering

Nowadays, technologists are paid very well and have good career opportunities in technical field. If you are technically oriented then you should do M.Tech or MS to specialise. If you are not technically oriented then MBA is a very good career switch option.

Germany is the hub worldwide for automobile and mechanical prospects. Definitely, it would be a good decision to pursue it from there.

Yes, if you do hard work and you are good in academics.

First, you decide where you want to work and refer to the job portals. Prepare according to the profile requirements.

Please go with your interest and strength, if u have good skills and knowledge so definitely u will get good money everywhere

The best country to pursue Masters in mechanical is Germany. However, Canada and Australia are good as well. Both have equal opportunities. If you want to make a choice between these two, then I would suggest Canada. As it is cheaper and jobs are relatively more in Canada. Their Master's program have Co-op option, wherein you get a semester to work and gain experience. This is part of your degree to work for six months.
I hope this helps.

Yes, you can take GATE. You must complete your undergraduate education. Also, if you are planning for a job in the PSUs, I think it will be quite difficult to get through this method.

Yes, it is a good choice. There are lots of job opportunities available for a mechanical engineer in New Zealand. You need to possess the required skill set to get a good job in New Zealand.