Prices in my hometown, Salamanca.
Big Mac, chips and coke like 4 or 4.50.
Coffee 1.20
Bus ticket 65-80 cent
Weekly groceries/meat/fish/pasta/fruit/milk/other food at the supermarket for 2 persons: 40-60€
Everything else as Daniel said, you could probably pay less rent sharing a flat with 2 or 3 students, but never under 150€/mo.
I have friends in Madrid doing IT stuff after finishing their studies and they are all around those 900€. They have to get money from their parents here and there. I'm lucky I did the 600 and 900 jobs while I was in college and still at home. The internet crash came about just as I started to work for more hired by the cudly nanny state.
We are fast and happily "converging" with the rest of Europe in prices, even surpassing it while salaries are pretty much stuck (extreme example: real state has been going up like 8% or 10%per semester for a few years now).