This actually doesn’t matter.

That’s because your visa is a “travel document”, giving you permission to travel to Canada where the border guard will decide whether or not you could enter.

Your work permit is your “status document” which gives you permission to work in Canada.

As long as you are not travelling outside of Canada during your work permit’s validity, you do not need to renew your visa.

Now, if you do want to travel, you need to apply for that visa extension and you should be able to do so online at IRCC’s website.

If you are married your husband can apply for an open work permit to accompany you on your work permit. If you are not married he cannot do that.

You’re past the eligiblity window for an open work permit. If you can get a job offer from a Canadian employer, you can still apply for a work permit. But you need to have status or you need to leave.

The short answer is “no”. You cannot go from a study permit to PR. That is impossible.

If your fiance is Canadian (citizen or PR) they can sponsor you for permanent residence.

If your study permit expired less than 90 days ago, you can apply for an “open” work permit. If you work in Canada in a skilled occupation for at least a year you should be eligible to apply for PR then.

There are no special visas for this situation. Anyone who does not have status in Canada needs to apply for a temprorary resident visa (i.e. a “visitor visa”).

No.

If your multiple entry visa is still valid, you can still use it. A temporary resident visa and a work permit are for two different things: travel to Canada and work in Canada.

No you will not get in trouble.

Your visa is a “travel document” which lets you come to Canada. Your work permit is your status document. So as long as you stay in Canada during the validity of your work permit you do not need to renew your visa. You only need a new visa if you leave Canada and wish to return (by air/train/bus/ferry).

Yes you can.

He needs to write them an invitation letter and then their custodial parent has to apply for temporary resident visas (visitor visas) for them.

You should leave immediately. You can re-enter Canada legally later, when you qualify to come.