We will be in Vienna three full days, April 15 through 17 (Sat-Mon), and need some guidance, please.
I've done a good bit of reading, and have decided our priorities for ticketed sights are Schonbrun Palace, Hofburg Palace (National Library, Treasury, and Riding School practice, if available), Kunsthistorisches Musem, and the Gallery at The Akademie der bildenden Kunste (Academy of Fine Arts).
I've had a good bit of experience at this, but find the ticketing/reservation process for these attractions more confusing than most. It's hard to distinguish the official sites from the third-party ones, and there don't seem to timed entry restrictions, or I just am not finding them.
Questions:
1. Will the Gardens at Schonbrun be interesting in mid April?
2. We aren't interested in seeing more living quarters, porcelain exhibits or the Sisi Museum at Hofburg. Can we skip those, or is one conducted through those parts, as in the palace in Madrid?
3. Are the Library, Treasury and Riding School separate tickets?
4. Are there timed tickets for Schonbrun, Hofburg (and it's various parts), and the two art museums mentioned? Someone wrote that they were just at most of these places and they just bought tickets as walk-ups.
5. Is there a good third-party website to buy tickets? I don't mind paying a little extra for convenience.
Thanks for the help - I know this is a long list of questions!