Download biniQDU from the Editing Tools download section. This allows you to extract the ini files for editing.

To change prices on things, look in the files xxxx_good.ini, or goods.ini. Most items should have a line "price = " or "cost =" (I don't remember which).

Remembering when editing the prices of ship hulls that the price you make it is not the price you pay. Ships also come with shields, which you have to cough up a sweet penny for, too.

Read the tutorials in the tutorial forum. That's the best advice anyone here can give you. They are chock full of great information, even if some of them are kind of cryptic. Also, check out the utility forum to see if there's anything else that strikes your fancy.