In terms of Topol...here we go (again, this is as Patti tells, I'm not judging, I'm just relaying what she says in the book).
The comment about him grabbing her breast to see how much meat was on her bones is true.
Also, apparently Topol hated the book so he ignored the script and played the character, The Baker, in a completely different way than the script called for. A minor character's dialogue actually called for him to provide exposition and Topol purposely played it differently in order to undermine the credibility of this actor/character.
Apparently Topol also hated the lyrics so at points during the out of town tryouts he would make up lyrics or just sing "bum ba dums" or "dee da dee" syllables in front of audiences.
He also (and again, this is according to Patti) sought to create animosity among the cast by choosing several chorus girls to favor and many of the cast members remember seeing chorus girls in dressing gowns leave Topol's dressing room half-dressed on a nightly basis.
http://backstagebarbie.blogspot.com