Before Internet days one would have to write snailmail to universities to request information that is now easily obtained from around the world 24/7. Google the university of your choice and you should see on the google search page a direct click to "graduate studies" or "graduate programmes" or "graduate degrees".
On the graduate studies web page you will have tabs that allow you to explore the various aspects of life as grad at this institute, including:
1. degrees, certificates and diplomas offered in the faculties and departments at the university;
2. fees and costs: tuition, books, laboratory, student union, and other incidental university fees;
3. financial support, loans available to students, student grants and awards given for achievement;
4. expected costs of living in the area, whether this is dormitory or off-campus housing;
5. information required by international students'
6. calendar: school year schedule and exam times.
Some information on admission requirements, courses that can or must be taken, faculty members and their research interests, departmental resources (specialty library, laboratories and research centers, etc.) will be found in the graduate studies page and some will be found on departmental pages. Check these out and compare for the institutes you may be interested in attending.
Somewhat harder to find are departmental and faculty regulations. Many graduate students never even know such formal regulations exist. Approved by the Faculty of Graduate Studies in many universities, these regulations help you know, in part, what you are getting yourself into. For example, the exams required and thesis stipulations for a degree. The department cannot in theory make unreasonable demands upon its students. Some departments have been known to deny to students the existence of such regulations. That is more difficult in today's world of Internet, but it can still happen. You want to know what protections are in place for students in the event of a dispute between the student and the department.
In addition, if financial support is essential to your ability to complete your studies, make sure you know what the university offers and how clear they are about having support available and under what conditions.