Here's the money exchange point. It's all simple. If you're a new member you get 100$ for the start. If your character is a Kage of a village then he/she gets 1000$, but remember, if you're the Kage you will have to spend money not only on yourself but on the ninjas of your village too, like buying new equipment, training, paying for utilities in your village, like light and water (always wondered if they actually pay hmmmm...) and stuff like that.
But there are also many other ways to get more money

1. If you defeat your opponent in battle you get half of his/hers/its current money, while he/she/it loses half of the money

2. If you post a message that contains more than 20 sentences you get 100$ (this rule might be changed eventually)

3. You can also borrow money from another character or the leader of your village

4. Also if you kill an enemy-nin on a mission you get 1$. The enemy-nin killing mission can take no more than 4 hours a day.

IMPORTANT: WHEN YOU'RE COMING TO GET MONEY, YOU MUST ALWAYS PRESENT A QUOTE PROVING THAT YOU GOT THEM LEGALLY (LIKE DEFEATING YOUR OPPONENT OR TYPING THE MESSAGE OR THE OTHER CHARACTER GIVING IT TO YOU!!!!!!
You can spend your money on food and drinks.

When you come here to get money, your message should look something like this:

20 sentence msg (quote) +100, defeating the char (quote) +50, money from Kage (quote) +20, killed 40 enemy-nins +40 total: +210$