if youve already started the game, which you have you need to download FMRTE, search for it, youll find it, you can change absolutely everything, dont recommend it, coz it ruins the experience, and its basically cheating, but if its your first go, then i spose you can be let off
but as dazdazdaz says, thats if your starting a new game, use the FM editor to increase their finances, and youll have to start a new game for them to take affect, dont forget to save the editor data as a different name, dont save over the config file, or your fooshked
then when you load the game up next and start a new game, therell be the option to apply your database
any questions, post back