No syllabus, but a course outline is provided which usually indicates what you will be learning each week. There is usually a reference to a textbook or some other resource which will aid with problems or questions for tutorials.
In my experience, about two-thirds of the courses have been structured really well so you know what will be tested in tests/quizzes/exams. The other one-third have been terrible, they just say "if we have uploaded lecture notes, then that can be examined; we don't need to physically teach you, but you are expected to learn foundational concepts in engineering by yourselves", and then expect us to do well, or question why we didn't do well. *facepalm*
A lot of people will find it harder to cope, but as long as you work with your peers, it's fine. As for notes, I guess it's a bit different in engineering where doing problems will be sufficient, as you will learn the concepts whilst you do questions.
Communication with lecturers/tutors is best done in person. Don't 'expect' a reply via email.
As for past papers, some won't upload past papers, so it's basically up to you to do tutorial problems, or ask higher years if they managed to obtain a paper.