I'm briefing you here. SRK was criticized and threatened not to screen his films in theatres by the extremist party Shiv Sena for his(SRK) some provoking remarks. Now SRK is regretting for his remarks as he now feels it may harm the other co-actors who are also a part of the film and whose lives depending on it.
To "take a toll" means to have a damaging effect. Presumably "took a celeb toll" means "had a damaging effect on celebrities". This casual use of the word "celeb" seems rather flippant given, if I'm understanding it correctly, the fairly serious nature of the story.