I will let someone else answer #1 but regarding the others:
-The day 4 test will be at one of the many sites they have set up and will the one closest to your rental. Remember the day you arrive
is called day 0, so count the days accordingly.
-The government will send out their own taxi for you
-On day 5 you will get test results. It could come anytime during the day but likely early afternoon.
-I would set up the car rental for a late day pick up on day 5, if you are unable to make it call them and reschedule for the next day.
-After you get the all clear, you will need to go to a police station to turn in your tracking gear. I was told any police station but
the one in west end said they weren't fully prepared and asked I go t town.