Help Cleaning up a Ballet outfit anyone??

[Badwolflabs]

I finally have a mesh that sort of is what i want but the mesh is a complete mess (its actually two different meshes merged)

 

what i would like help with

1 clean up the leotard mesh

2 setup the leotard mesh to be cut down into a cami/bralet and panties

3 setup the tutu

 

https://www.dropbox.com/s/fqgece6oh6yq0xj/dollleob.blend?dl=0  

the blend file so far