Again from experience:
1) You get a transcript of some sort for each set of results, it will be part of your HEAR report if your uni does that. Then once you graduate you get your diploma saying which class degree you got
2) You usually get results ~4-6 weeks after the end of exams, between the end of June and mid July depending on the uni.
3) (edited: thought you said is it easier than GCSE/A level lol but I'll leave the answer up) Depends on the person and how you adapt to uni, some will find it much harder than A levels as the nature of how you need to study changes and you have to learn a lot more, others will find it much easier because the difficulty of concepts tends to stagnate and you're focusing on things you're highly interested in.
4) At my uni exams are marked externally and then moderated by several other external and internal staff, so it's arguably a safer system than with GCSEs and A levels. Coursework is marked by professors and PhD students however.