Just read a great article on how the German "free education" system worrks,

[napi21]

9. Here's an article that explains costs for International students,

http://www.studying-in-germany.org/what-does-it-cost-to-study-in-germany/

From October and on, every federation is required to abolish tuition fees and offer free higher education to native and international students alike. The federal states of Bayern, Hamburg, Niedersachsen and Nordrhein-Westfalen that were charging tuition fees up to this event are now free of charge just as any other University in the country. These previously obligatory fees account for about 500 Euros per semester, now saved, which will allegedly help German students with the living costs in the future. However, postgraduate degrees don’t fall under the same decision therefore tuitions will continue to be charged for Masters and PhD degrees as in the past.

In Germany one has to pay 10 Euros for every three months in which he or she visited a doctor, if insured. Without the insurance these costs and the costs for drugs and other medical treatment can increase very fast even if nothing bad happened. Those who do not want a health insurance because they think it is only necessary for bad illnesses or accidents are wrong. Also accidents can happen easily during the time abroad. It can be a simple sports injury or a traffic accident whilst shopping in the city. If hospital stays and operations are necessary the costs cannot be covered by students. An additional private health insurance covers the costs that would provoke high co-payments with the normal insurance.

A further search of the site says the cost of health ins. for an international student is 33,10 eu.