1. Used at the beginning of a sentence to mean that what follows is in addition to the sort you or your partner have just mentioned. English = and another thing, moreover, what's more, and so on.
2. Used immediately after a question sign (e.g., 'who' or 'what' or ‘where’) to ask the same question a second time, but this time about something, someone or somewhere different (e.g., 'Who else?’ or ‘Who in addition?’). English = else, in addition.