1. answered
2. once your positive test is reported, you will receive a Quarantine Notice from Public Health and in most cases they are retesting with a day or 2 to ensure the first test wasn't a false positive, Assuming you are still positive, they retest on day 10 currently. They may allow it early based on vaccination and symptomatic vs. asymptomatic status.
3. Pretty sure it's 10 days now.
4. answered
5. after your quarantine time and retest, Public Health will issue a quarantine release letter for you to travel with.