if your ielts result is above 6 you can apply for some of universities that is not so good or you can apply for the foundation course in the unversity first then after one year you can apply for better university. but it still depends on your future ielts results and the foundation course result. it also depends on the course that you will take in the university. some of the courses do not require high socre compares with others. usually, business courses will require higher ielts result and the academic courses result compare computer courses. this is what i know in uk. i am not sure if it will be the same in other european countries. for more information you can check the rank of the uk university http://www.timesonline.co.uk/global/ and i think most university will have their own foundation course. it usually will take about one year. you can check each university's website to find more information. hope this will help you.
usually the undergraduate courses in uk is about 3 years it will save you a lot of time but the tution fee is quite expensive and it also depends on which city you want to live. good luck!!