All of the Olympic tennis rules are in the related links section.
In the final it is the best of 5 sets for the men like in a grandslam unlike the rest of the Olympic competition which is the best of 3 set just like any ATP tour event
3 or 5. It depends on the tournament.
Rogers Cup is the best of 3 sets.
92 times a day
Its best of five sets, so whoever wins three sets wins.
Depends. Usually 2 out of 3 sets unless you're doing 3 out of 5 sets.
Best of 3 sets in Ausralian open are played with tie break if needed in the 3rd