1. Since there is no immigration barrier a conjugal partner application would be a hard sell. Your call.
2.
www.cic.gc.ca3. Provided that the border officers admit him, yes.
4. Outland applicatins are usually faster than inland, if that is what you are asking.
5.
www.cic.gc.ca6. Both of you fill out separate parts of it;
www.cic.gc.caWhen I posted
www.cic.gc.ca the answer to your question is very easily accessible on that site. I assume you weren't aware of its existence, however, it's the official site with all the information.
You did not state this, but I assume you know you have to be a PR or Canadian citizen to sponsor him.