A468 Yes, though I think this is sloppiness on their part in the wording and I think they intended for the listed abilities to completely replace a normal familiar because it could just get wonky. That's how they worded it with the Gravewalker's poppet and that actually has a spirit in it while this is clearly a lifeless inanimate object. So Alertness would by RAW apply but spell sharing is not relevant in most cases. For instance, Burning Gaze would be pointless with no ability to move and no actions.
Q 469 Can the horse or pony from a Mount spell attack on command?
Q 470 Somewhere on this forum, someone said that when mounted, movement is your mount's action allowing you to perform a separate move action (Ex: Cackle hex). Is this true?