2. Peacocks are pretty loud in the breeding season and will also honk at any loud noises. Their calls can be heard for miles away. Hens are much quieter but can and do make loud honks/call when excited or disturbed. Peacocks are probably too loud for close neighbors so I wouldn't recommend them in the suburbs unless your neighbors also don't mind them. A Peahen or two may work out just fine though.
....posting others below due to character limit