As somebody who just went through the horrors of auditioning for every MT school under the sun, I have a few pieces of advice.
1 ~ Definately take Ballet. No matter what school you audition at they are going to make you do a jazz and a ballet combination for the audition...Ballet IS the foundation of ALL dance.
2 ~ Do research and find out how the school views Acting, Voice, and Dance. For Example, If you're going to Audition for UofM, Cincinnati, Webster, or Syracuse make sure you're a spectacular dancer. All VERY dance centralized programs. Also, there are a lot of schools though, who will take you b/c you can act/sing, they'll add you to their class, and then they'll accept a few dancers too. It's all about an equal balance.
3 ~ Know what you're getting into. If you need it, I have a list of all the good Musical Theatre Schools in the Country. It also says what their main focuses are. It might be helpful, let me know.
Anyway, good luck, and do me a favor, whatever you do...DON'T GO TO AMDA...YOU DON'T GET A DEGREE...IN THIS BUSINESS, YOU NEED A DEGREE!
Happy Hunting!
"Love is stupid and it bleeds, it satisfies my needs, I think it's wonderful..." ~Bill Finn is God!