hmm technically, this stuff has been answered in a general sense of med school in Pakistan, but for KE, I'm not exactly sure. To get a rough idea, search the forum but use words like hostel instead of dorm, and you should be able to come up with a lot of info.
Roughly speaking though, if you study about 3 hours a day, you'll do fine. The workload is much more than an american medical school, and it's very easy to fall behind quickly and then fail, and then be known as a bad student, which will further perpetuate your failing.
The teachers are mostly interested in your ability to fit in, in more ways than one. Meaning, you have to fit in religiously, culturally, and academically. Study everyday, don't do anything you don't see anyone else doing, etc etc and the teachers will love you for it. Not following any of these suggestions could land you in a bad spot very easily.
The grading system, eid break, and dorm (hostel) is different at every school, so let's hope some KE people drop by this thread.