I've seen some mannequins or statues with clothes (idk how to call em) in some people houses. Where could I get em and how do they work?

I earn lots of gralats (well for me it's a lot I guess?) but idk where should I spend them? Collecting something? Any tips? Ty!

Sparring. Is it like pvp'ing between guilds? Or between guild members?

There's probably no such item as a prize machine? Where you put item in and whoever reaches it, can take the prize?