No. Ambitious directly means "determination to succeed". In this context, it's being used to show a large amount of something, which isn't right.
"A"
This sentence is used as a proof and is clearly indicated as such.
Well a typical example would be where that character is always moody, never happy, always has that darkish and more realistic type of feeling. hope this helps.
I am fairly certain the answer you are looking for is false. Hope this helps