Altimeter will be in inches "Altimiter 29.92"
The other things is conditional landing clearances: "You are number three behind the Warrior on base and the Cessna on short final. Cleared to land."
Or you may get a "Cleared to take off, cleared to land" if you're doing circuits
Clearance Delivery can be very useful - VFR and IFR. Often (when VFR) you just contact them tell them your details and they get you to contact ground for taxy and that is it, - they just want to know about you. But if you want you can call clearance and request "VFR flight following to XXXX at 5500' from runway 30" on the ground. This great as you'll get a transponder code and departure frequency on the ground before you taxy. You may get a brief clearance like "climb straight ahead to 500', left turn 200 degrees". When you take off tower will tell you to "contact departure" which you do and they radar identify you, and there you go, VFR flight following all the way to your destination from 500'. You stil navigate VFR but you're being followed.