Your situation and questions are somewhat convoluted. It's not clear e.g. if you're currently in Canada, or if your job offer as a press operator is in Canada or some other country.
First off, figuring out how to become a permanent resident in Canada (there's no "PR in Toronto or Ontario") is not a matter of one question you post on a forum. There's way too many factors to consider such as your previous experience/stay in Canada, your current job and its NOC/duration/level, educational background, age, language skills, job offer, type of work permit/visa....
You better get down to work and start perusing the CIC website to get abreast of immigration streams, be they provincial, federal or specific to the province of Quebec.
To your first question about job and studies, the relation between your studies and your job doesn't usually play a role at all.
To your next question about NOC and category, it's not that certain NOC's fall under certain categories. It's more complex as indicated above. If you're serious about immigration, you must sit down and start reading official web sites such as CIC, provincial programs, and the like!!!