Failure to not mentioning it will be a misrepresentation in your Canadian PR application as well. Write everything truthfully. It shouldn't impact your PR application as long as you mention each and everything truthfully. Your application will probably go through some additional background checks though.
Yes you should tell the truth!! Even if you hide it they will find out and you will probably get banned again for misrepresentation. So be honest and explain everything!!
I don't think it will impact your PR but your processing time will probably be longer
u won't get a ban on your Canadian application for sure as long as you are 100% truthful...
As someone mentioned above...expect a delay of upto an year for PR....