You can earn euros as construction worker or as kebab shop clerk, if your superior compatriot who is actually speaking some german gets you in, but that will feel somewhat like slavery because you will be fully dependent on him. Burger King, McDonalds and similar don't employ many Turks, at least I haven't noticed. Bila and Spaar is for girls. If you want to dance on the street and get your money and street performer you'll probably need some permit because there isn't many of those and police is checking them regularly. There are Turks doing their dances in the evening but think that is part of national customs, when they are gathering together.
Not sure where you come from or how rich your parents are, but they have to be
extremely rich if you want to study in Vienna without doing anything on the side. Doubt you have full scholarship, otherwise you wouldn't ask in here. Universität Wien is nothing short of being glorious, campus area is excellent too but doesn't seem like a place where random Turkling will go far. It is too close to city core or Innere Stadt, actually I think it is within Ringstraße. That means you'll travel long distance but good thing metro is great way to get anywhere you want within reasonable time frame.
Good and bad thing is there is a lot of Turklings in Wien, actually there too fucking many of you and don't want to see what muslim uprising in that part of Europe would look like. Good because they are your fellow countrymen, speak your language and you can familiarize with them easily (not so much with Austrians, they are either stone cold people or annoying motherfuckers who want to get into your culture but deep within are same as first kind) but for some reason I feel they would try to doublecross you and make you their bitch. I know for a fact Yugoslav people do that to each other, like fucking Mafia with ranks and all.
Wien is foreign city, looks like its mixed culture city because there is ton of tourists but actually it isn't. It is German as it can get. Also don't mention their beloved Ad
olf, that is against the law. But they didn't erase every trace of his existence, there are those famous chocolate chip cookie eagles made of stone on each side of an entrance to some important building near the place where Ad
olf took some famous speech back when he was hottest shit in lands of Wurst und Lederhosen.
Shame there isn't new Ad
olf around, I was contemplating setting Parlamentsgebäude on fire as any true communisten would do to help Ad
olf seize all the power for himself and once again make glorious Reich even more glorious. Seen few cracks in der Autobahn, Ad
olf would certainly fix that
Bottom line, it is probably too expensive for you to study in Wien bruh.
PS. I've been at chadz place, he ain't there