Undergraduate European Computer Science Schools and their application process? I'm a U.S. sophomore (junior in the fall) studying Computer Science looking to transfer. I have three questions:


What schools in Europe should I look into for Computer Science? To clarify what I'm looking for out of this question, I'm not asking for schools tailored to what I'm seeking (ie, will this school be good specifically for me), but rather the shared consensus of which schools are considered respectable for Computer Science. For example, even in the states I think everyone would say Oxford and Cambridge are well respected, but beyond that most (including myself) are not aware of other schools not in the U.S. 
What is the timeframe for applying to these schools? In the U.S. most schools allow you to transfer into the spring or fall semesters, with the application being due approximately 6 months in advance (for example, due in March for fall semester that starts in September) and the application process starting 9 months in advance.  
Ballpark, how much does it cost for international students to study at these schools? I've heard that University tuition is much lower in Europe. I have tried transferring to schools in the U.S., but for both schools I got accepted into the financial strain of ~30k in loans per year made it impossible to transfer. I don't want to waste my time applying to schools across seas if the same will happen.
If you believe in university rankings here is the one from QS. According to it, the following nine European universities belong to the world top 50 in Computer Science: Cambridge (UK), Oxford (UK), ETH Zurich (CH), Imperial College London (UK), Ecole Polytechnique Fédérale de Lausanne (CH), École Normale Supérieure, Paris (FR), University of Basel (CH), University of Amsterdam (NL), London School of Economics and Political Science (LSE) (UK). Basically, I would say that all universities in the world top 200 list are good. 

Moreover, depending on what are in Computer Science you prefer, it might be a good decision a university outside of this top 50/200 if they are specialised in the area you like.