You're probably not getting answers because the questions are too obvious, and boring.
A127: Share Spells (Ex): At the druid's option, she may have any spell (but not any spell-like ability) she casts upon herself also affect her animal companion.
If a wizard casts Wish at your character, you didn't cast the spell yourself, so the animal companion gets nothing. Same with a spell effect provided continuously by an item.
A130: Of course not. You can only cast your domain spells from domain spell slots. Druid does not have domain spell slots.
Druid's pretty broken even just with the core books, but come on, if you want to break your druid, at least put some effort into it.