What should I do after completing my NTTF diploma in tool and die making? Should I study or work? If study, what should I study?

Most people come to NTTF for its placement assistance. If you are in a situation where you have to choose between a job and higher studies. I suggest going for a job is the better option. Even if you go to higher studies you are gonna get the same job. 

NTTF offers decent placement opportunities. According to the recent placement highlights the highest and average CTC offered at the institute is 1.5 LPA and 5 LPA. 

So, doing the job is the best thing for NTTF passed-out students. If you want to do big in your career, pursue and complete your degree in a good college.