1) there's no stated limitation on the distance.
2) you can cause it to reappear in any unoccupied space within 30 feet of you.
Maybe. But I do use line of sight for both effects.Nah, it's supposed to do that. That's how it was designed.
I’ve interpreted it that the familiar itself chooses how and where it appears, not the caster.This is for 2014 dnd.
1) from how far away can the wizard place their familiar in a pocket dimension?
2) from the pocket dimension, they can summon the familiar. How far away does the familiar appear? Can it appear within a box or behind door? (Aka a quasi teleport?)