~구요 is 입니다 + and, when the sentence is not finished yet. It's just like how ~지만 is 입니다 + but, in the middle of a sentence.

~러 - in order to / for the purpose of
자러 가야겠다 - I'm going to bed. (I'm going in order to sleep)
밤늦게 - late at night

~양 - Miss. When used by friends it is like ~야 but cuter. (I suppose it's like ~tan in Japanese.) It would generally be used at a formal party though, 니키양.