I suggest taking a grappling style, either BJJ or Judo, and a striking style, boxing is probably best. This will give you a good idea of where you're skills are and what you will need to improve in order to be a better fighter.
Originally Posted by smilee22
1)which combined martial arts to use, and how many.
Most MMA fighters aren't masters of anything, except for some of the BJJ guys. Become well versed in different styles and focus on becoming a mixed martial artist.
2)how long it would take to master the martial arts.
It will probably be about 3-4 years before you're ready to start really fighting
It takes about a year of amateur fighting before you'll have the experience needed to quit the day job. If you're really a prodigy then maybe 6 months of amateur fighting. That really depends on you.
3)When i would be ready to enter my first real MAU fight.