First thing's first. Since you're world-building, you probably already know about GeorgeS's site here:
http://66.159.225.58/eqemu/eq.html. There's a great loot editor in there that will allow you to set a random loot table to assign to your mobs.
The aggro radius, I think, is simpler. I believe the setting is one of the columns in the npc_types table, but you'd have to check the wiki to be sure. That's where I swore I found it, so just search on Database Schema for it and other subsequent questions.
Hope this helps,
D.