Money

[I Like Rome]

I can't get the amout of money that i get to go up? how to you stop it from going down?

[Aradan]

The same way you do it in any other mod. Disband unnecessary troops, build farms/ports/mines/traders, conquer regions... Decreasing the campaign difficulty levels also increases the money you get.

[StealthEvo]

It depends largely on what faction your playing actually, even on the higher difficulties. There are some regions that once captured give a boost intrade that allows you to stabilized

[Nehcrum]

I can't get the amout of money that i get to go up? how to you stop it from going down?

All factions starts with too many units for their economy in FATW.
So you will lose money, your options are to disband units to decrease costs, or to capture cities.
Best thing is also to spend all your money on the first turn (on economy buildings for example) so you won't be completely stuck until you manage to turn it around.

Your income will increase as your population grows, even if you don't do anything with your cities and troops.

Best thing is to send out units to try and capture city, either you take the cities and get some more income, or your units die and you won't have to pay upkeep for them.
Either way, it will benefit your economy.