Not to mention the cosmopolitan shopping streets that would rival any in the world. German of the very special Viennese kind is the language and English is generally spoken in this city housing so many International Organizations and events. Since Vienna is in the very center of Europe, it is very close by car or train to other capitals and metropolitan areas as Munich, Milan, Budapest, Bratislava and Prague. Not to forget the exellent network of subways and streetcars all over the city. The use of appliances or electric devices designed for 110V needs the use of a transformer.
All foreigners require a valid identity document.
For EU citizens applies certain rules, but all other foreigners require passports and for a few countries also visas. Be sure to check the current situation for your country at your local Austrian representation before departing. There you also find the application forms.