If you just stop at a light then no, but if you park, if you dont use your e brake then the car will rock on your transmission, it's very nad for you're tranny, also transmissions can slip out of gear and start to roll and could cost you the price for the damages for your car and whatever it decides to roll into. Also keep your wheels turned to the curb as he mentioned

Hill stop or Hill parking? For a stop no- for parking on a hill it is a good idea but not mandatory.

On your test you need to use the e brake .

No, you don't "have" to, but it's safer.

Don't forget to turn the wheels towards the curb.

yes. read the manual