If you want alot of money quick, go to anysafe house that you own. Pause the game and then enter the money code. (x,y,x,x,y, click left thumbstick). You should get $5,000. Save your game. Go to the pause menu then click quit game. Now you are at the main menu. Load your game and repeat as neccesary. I got $150,000 in about 10 mins.

Im not sure if this is just a glitch on my system or what, but when your rank is underboss, right before you become don of the Corleone family, wait 'til night to bomb the Barzini Compound, and THERE WILL BE NO ONE THERE, so you can just waltz right into the two buildings, plant the two bombs in each of the basements and get out of there

No you can't shoot out of your car
Yes you can become don
You kill don cuneo don stracci don tattaglia and don barzini
To become don you must extort every business own every racket own all warehouses own all hubs own all compounds and beat all the story missions and do all the contract hits and you must pray the yankees will drop dead and the redsox will be all mighty! Mu ha ha ha ha ha ha ha!

1 you kill monk malone
2 you kill tesio
3 the don dies
4 sonny dies
5 michael becomes don
6 you kill jaggy jovino
7 the redsox will obliterate the yankees in the next world series