To unlock the second voice sets play through arcade mode twice with the character that you need the voice set for.
yes you get him if you Clear Arcade Mode with Kurotsuchi Mayuri
Do Hanataro's episode mode
finish arcade mode with that character to get his/her voice 2
Umm.. HIchigo isn't in Shattered Blade
yes there is.
Ichigo doesn't have his hollow mask in Shattered Blade but he does have it in Versus Crusade
you can't
yes
clear arcade mode with Aizen Sosuke
Jushiro Ukitake. Captain of Squad 13.
yes is is worth buying
Do training mode and arcade mode