Q96

a: At seventh level, a Dread Necromancer obtains a familiar, with a handful of modifications-- not gaining speak with others, changing type, and most importantly for my purposes being able to 'store' uses of Charnel Touch and other Dread Necromancer abilities. If a Dread Necromancer were to take the feat Obtain Familiar, would the familiar from this feat, being "a dread necromancer's familiar", be similarly modified?

b: If a dread necromancer were to already have or subsequently take levels in a non-Dread-Necromancer familiar-granting class, such as wizard, how would the above interact with the familiar?

c: Is there a limit to how many 'uses' of Charnel Touch, or for that matter any other ability, a Dread Necromancer's familiar can store?