If using Search Everything from the RU Library home page, the default setting excludes non-electronic content. Some journals remain print-only or are only partially digitized. Subject specific indexing and abstracting tools like America: History & Life will also identify resources that you can request through the Racer Inter-library Loan Service.
There are numerous initiatives to digitize the text of local newspapers as well as the photographs and negatives of newspapers and news agencies. Additionally, the amount of indexing of historic newspapers continues to increase.Some relevant initiatives follow:
The Google News Archive was live from 2006-2011. The addition of new content and access to the home page was discontinued in August 2011 according to an entry in Wikipedia. You can still browse the content of the Google News Archive but the search function is far from ideal.
See also Carol Singer's extensive guide from Bowling Green State University Library: Historical Canadian Newspapers Online
Archives at the local, provincial and national level may be custodians of important primary sources, particularly photographs, registers, legal documents etcetera. Some university archives also contain unpublished theses and dissertations that are not available in digital or microformat.
Archives and Special Collections LibGuide -- Ryerson University
Archival Research Tutorial -- York University Libraries
Using the Archive webpage -- City of Toronto Archives. [The staff at this archive is extremely helpful to inexperienced archive users. Groups of 10-30 can book a tour and orientation to the archive.]
MHSO Multicultural History Society of Ontario