No, a handful of polished college players go directly to the majors after being drafted, and also most of the Japanese players in the majors never played in the (American) minors.
A player can be drafted to the Major Leagues after he completes high school.
only about 3% of players who are drafted will play a day at the major league level, so even less will actually have a career in the big leagues. About 80-90% of professional players never make it above class-A in the minor-leagues.
be a good ball player enter the draft and get drafted
There is the NBA and there is a league with players not quite at the NBA level. The NBA is the major league with the professional basketball players. There are also college leagues, and elementary schools even have leagues.
in the major leagues, almost 100%
Currently there are none in the major leagues.
Yes, most major league players make their first great leap to the major leagues from Triple-A affiliates.