German here. Unless you specify WHICH type of tea you want, you don't get any. But once you cleared that up, you usually get a cup of hot water with the tea bag (unopened) and 1-2 small packs of sugar, plus maybe a small cookie.
Not really IMHO. They're usually Mürbeteigplätzchen - dry, plain, only slightly sweet, with a sandy, coarse texture. They're meant to be dunked into the tea to soften them, but I dislike having squishy crumbs floating around in my drinks, so either way those cookies just aren't for me.