i just used the "search forum" tool, and typed "make money" (no quotes)... almost every single post that comes up (on the first page of 10) is useful.  please try to search for similar posts before posting a simple question that many others have probably asked before.  thanks.
--jason

just rob pepole's houses

you cannot rob anyone's house unless you are a subscriber.  and robbing is very difficult when you start out.  it requires a lot of money to get you going before it will make you any money.
--jason

you can sell things to a store 

Take a look at the market which items are usually selling at high prices such as 

crocodile skin !!! or 
crystal plates or
hydragen-carbid...

ALWAYS sell them at the market so you get several times its value....

Hope this will help a lot
                       Michael