You can work several jobs like mechanic, prostitute, pizzaboy, smuggler, driving a securicar that is located by the bank.
You can rob a bank; just go downstairs until you find the vault door and from there, it is your choice whether to hack (to be able to hack, use the key arrows under the 'enter' button) or to blast it with an explosive (you must wear at least 1 satchet explosive). In order to find a bank, you can type in the chat /gps bank