Work Permit Questions

I've been trying to ask questions about getting my work permit. Seems there really isn't anyone you can call just to get a few general questions answered.

I have been offered a job near Montreal. I want to find out exactly what papers I need to file vs what papers need to be filed by the company hiring me.

I also have a question regarding the work permit application. It says you need to prove that you can financially substain yourself and your family. I'm going to be starting work as soon as I get there, probably withing a week of physically moving there, so exactly how much money do they expect you to have ahead of time? And will it effect things, that I'll be moving in with my boyfriend whom already lives in Montreal, since I won't have expenses such as rent and stuff when I initially move there?

They also say that they want a reference letter from your current employer. What if I don't have one?

Now, I know traveling up to Canada to visit with my son (he is 2) since me and his father (my ex) have no legal custody papers, he has to have a "consent to travel" form along with his passport that is signed by his father and notarized basically saying that his father gives him permission to travel to and from Canada with me, so they know i'm not skipping the border with my son. Will I need a similar thing when I move? A notarized consent form saying his father gives him permission to relocate to Canada with me?

And what is the likely hood of having to have medical exams done for me and my son?

Any information is appreciated. I've read through the CIC websites, and I think I understand, but I want to make sure that I'm doing every last thing correctly before I submit forms and do not do it correctly, because I do not want to lose the job I'm getting because of some papers not being filed correctly.

of course you can apply for it but make sure that you can really prove to them that you are financially stable.