"I am spoiled, it's true. I don't even know how to use that thing in the kitchen with the burners"

Cindy Margolis is making a joke about her absence of domestic abilities. She is implying that she is so ruined that she does not even recognize exactly how to utilize an oven. This is a funny means of stating that she is not utilized to doing family tasks or cooking. It is an easy going means of claiming that she is not used to caring for herself. She is suggesting that she is so used to having another person do the work for her that she does not also recognize how to make use of a basic kitchen home appliance. This quote is a funny means of saying that she is not used to looking after herself and also is used to having another person do the work for her. It is a laid-back way of stating that she is spoiled and also doesn't recognize how to do standard jobs.