I don't remember too many pack-off take offs, even in places like DEN. The -219's have gobs of power. Those engines mostly on the 88's if I recall.
Older birds without the upgraded APU's cannot run both packs on the ground with APU only, if I recall.
Lots of turning, pushing and dialing on the flight guidance control panel, but the system does work pretty well.
Auto Throttle technology is old, and NOT designed by a pilot, so don't expect it to be super smooth in some regimes.
EFIS birds are a very basic EFIS and is a 4-tube system. Even the '88's. You have an EFIS ADI and an EFIS HSI/Nav display. Radar is displayed on the HSI/NAV
Simple systems. You'll learn it quick