1)What do you want from the tombs when im banning base classes from anything but PHB?
2)Most definetley not
3)Any core yes
4)Back pack is considered to be on your person so normal rules apply, however, players also have an inventory, kinda like a bank, that they can store things as treasure, spare weapons, quest items, thats not considered on ur person. however anything on ur person encumbrance rules apply. and anything not on ur person, but in the "bank" requires a concentration of 15 to retrieve in battle.
5)Yes, lethal damage is automatically turned into non-lethal damage
6)No, anything without a specific item name, cant be entered in your bank
7)Shut up, you know what I mean
8)I have no idea what you mean
9)This campaign will be in person, i just figured this would be an easier way to get it out to people