http://www.newfoundlandlabrador.com/...Schedules.aspx for ferries between the mainland and NL.
http://www.traversiers.gouv.qc.ca/en/index.php for ferries across the St Lawrence east of Quebec City.
Newfoundland is only accessible by ferry. Not sure what you mean by "not B4 visited" the whole area is a tourist destination, it's only varies by how many tourists go to any individual part.
For Isle de Madeleaine http://www.tourismeilesdelamadeleine...ng-725-car.cfm