The most widely recognised TEFL certificates in Europe are the CELTA and Trinity Cert TESOL. Take a look at the websites - Trinity College London, and Cambridge ESOL, where you will find details of the content of both courses and details of course providers. You will find a range of providers spread right across the globe, and also a range of course fees. Any reputable course provider should be willing and able to answer your questions about their course.
I suggest you have a good look around, do your research, and contact any course provider you're interested in and ask questions.