$9 million:
When starting a free game, set your percentage to the highest that it will go, and your opponents to the lowest. When you start the game, you will have $9 million.
Mission selection:
When you are offered a mission in a blue envelope that you do not like, instead of refusing it, click on the "Town/Pizza" icon and the envelope will disappear. About ten game minutes later, you will be offered another mission.