You need money?? Each time I play through the game, I get to the end with so much gil that I buy sets of 99 Elixirs. Then again, it may be because I like to level-up a lot.

If you really want to cheat, I suggest a program that edits the savegame, not a gamegenie code. If you want one, I have made a savegame editor (in beta, far from completed, but it has a lot of functionality). If you ask for it, I should put it on my web site temporarily...

Of course, there are other editors, but as far as I saw them, they come far from what I have done (yet).