Apparently, there's a plan in the works to implement multiple stash tabs, but nobody knows when or if that will ever be released. Until it is, you can use the Median Offline Tools as a kind of substitute. You can't use it while you're in-game, but it still helps a lot imo. You can find it under the 'tools' tab in the 'game' menu in the upper left corner of the site. Download it, unpack the file, run the program. It's pretty easy to use, and also allows you to respec and rename your characters and their mercs.
As for the gold... sorry, I think you're out of luck. I'd like to see that too, but I don't know of any mod that lets you do such a thing. Please let me know if you do find one, will you?