At present, there are four court levels:
The Supreme Court of Canada which is the final court of appeal in the country. Supreme Court Reports can be accessed from their website dating back to 1878. In 2017 an agreement was made giving Library & Archives Canada case files older than 50 years.
Second is the Federal Court of Appeal and the Provincial / Territorial Courts of Appeal. They deal with appeals of decisions made by lower courts.
Third are the Provincial & Territorial Superior Courts, who handle the most serious civil and criminal cases.
Fourth are the Provincial & Territorial Courts that handle most of the court cases. Their records would include coroner records, correctional records (prisons & jails), criminal justice records, divorce records, fire marshall records, guardianship records, and wills.
For information on Provincial & Territorial Court records, please see the GenWeb that covers that area.