Money
Silver Standard, altered. Prices will be altered to fit a 1930s economy, roughly.
Death
A character will only die if the following 2 events happen: They fail all 3 death saving throws AND Nobody can revive them after combat
Succeeding on 3 death saving throws during combat will let you come back up with 1 HP ONCE, but suffer from temporary exhaustion. Once you go back down, it's as if you failed 3 death saves.
If you have failed 3 death saves, but are stabilized after, it takes a long rest before you are conscious again, even if some method would give you HP.
Extra Attack
Extra Attack can be used for spells that are connected with an attack, or require touch/melee, however, your attack MUST include a melee attack as part of the action that triggers Extra Attack.