Buying TC will just reduce your ACTUAL money. The fun way is to haggle with marketeers for some items and resell it at a higher price.
For textures, if you want to know how much does your art worth you can ask it at the Price Check Megathread thread, or do what I told you before.... haggle for a texture/win an auction and sell it at a higher price.
Dueling, tourneys, etc used ingame skills which you need to master.
Betting is all about luck, once your side lose, you will lose the TC that you bet.
Another way is to win events or do art requests. With that, you will know how much/what you will get if you win the request/event.
The key of getting money fair and square is to be patient.
Good luck.
Last edited by jokerstein; Apr 19, 2012 at 01:59 AM.