I suspect that your son is an Italian citizen and therefore does not require an EEA family permit. However, it is still possible to answer this question.
For questions on employment, income, and expenses, you can write "not applicable" or "does not apply." These questions are actually irrelevant to the EEA family permit generally, but they are all the more irrelevant for someone who is one year old.
For questions about the sponsor, you should answer with reference to your husband. In the context of an EEA family permit, the term "sponsor" denotes the EEA national from whom the applicant derives the right of free movement. In this case, it is your husband.