ExploderWizard
Hero
Oh sure, and different people will prefer different implementations.
Yes, and thats fine. No problems.
Generally true, with one notable exception: magic weapons.
Seeing as characters couldn't damage a significant number of mid-to-high monsters at all without magic weapons, it's safe to say it was a basic assumption of the system that characters would posses them.
I know for sure that the red dragon didn't require magic weapons. It is also safe to say that if the DM decided not to use a lot of these monsters then magic weapons could be more rare ( a style preference). At a minimum, the bonuses from such weapons were not as important against all foes of a given level range.
Find me a classic AD&D module intended for mid-to-high level PC's that didn't tacitly assume the PC's had enchanted ironmongery.
Module A4. The PC's are 6-7th level and begin the adventure pretty much nekkid and without spellbooks. By the end of the adventure they have to face the BBEG group of slavelords with whatever gear they can cobble together after a daring escape.