dont understand rules, but do know that it is very popular, and that games can last for several days.
Depends, if it is a One day test match or 3 or 5 day match.
A one day test, if I am not mistaken consist of 50 overs, which means 6 pitches per over.
So, for example a team could see all 300 pitches. If the umpire calls a Wide ball, mean well outside, they have to pitch again. So, you can't throw it wide on purpose.
As for the scoring. If you hit it out on the fly outside the white circular boundary in any direction, it is 6 runs. if you hit and rolls on the ground or hits the ground before exiting over the white boundary it is 4 runs.
If you hit (the equivalent of a single, you can score one run, as you and the other batsman (baserunner) will be switching positions.
If the ball is caught in the air you are out. If the defense gets ball to the wicket before you reach past the line (the base) you would then be out. That is much more difficult.
It is actually a very intersting game, used to think it was stupid.