1. How can I easily get the brake drum off? - remove rear wheel, pull drum off. you may need to loosen the pads - see below
2. Is the brake adjustment like other drum brakes...ie, a star wheel to adjust? From inside or outside of drum? - you do not have star wheels but 2 large nuts on the back of the dust shield. these turn the circular adjusters. one way tightens the pad the other loosens. you have one for each pad.
what I usually do is jack one rear wheel, support car of course, dis engage the e brake, turn wheel, then turn in one adjuster till the wheel does not turn, loosen till it turns . do the other the same way. then go to the other side.
3. Is there any adjustment of the emergency brake at the rear wheel, or is it at the lever? - the adjustment is at the lever,
good luck
matt