I live in a mobilehome with 50 amps service. The park said I could upgrade to 100 amp service. Please tell me what I need, panel, breakers etc.
Thank you

Thew short answer is the new service needs to be rated 100 amps, to include the panel, breakers, etc. The question is too broad, and you need to meet us halfway. Besides the obvious of a 100 amp panel, we need to know how the service is metered, distances from the source to meter and to panel, where will the panel be located inside or outdoors. More detail will help you receive a detailed answer besides calling in an electrician.