As the above poster said, just to clarify, you cannot transfer gold between Skylanders.
This is just one of those rules enforced so that you have no choice but to experience the figurine from the ground up.
It'd be pretty silly for you to spend 9 - 10 dollars on a character only to have ANOTHER character boost them.
All the characters are good in their own way, you just need to figure out how to use them and grinding them up helps with that. Just head to the Lair of Kaos and learn how to use them while you grind up money / XP.
Trust me, taking a level 1 character in to the final level, you learn how to use them pretty fast, otherwise you die quickly.
Gamefaqs - Where you TOO can get an extra dose of textual diarrhea.