book 2 chapter 7

I'm not sure what you mean by the first part of this question..... the scene is important because it signifies to us as readers how inept and incapable the monseigneur was. The scene involving his "chocolate" describes how dependent the man is on his servants.......

As for the second part of your question; the Marquis howled and cried when the child was run over by the carriage;

"A tall man in a nightcap had caught up a bundle from among the feet of the horses, and had laid it on the basement of the fountain, and was down in the mud and wet, howling over it like a wild animal."