Radio/tape Cd Player problems of the 2003 Chevrolet Avalanche

I bought this vehicle and the cluster is out I do not know what model this is other than a z66 so I cannot see on how to program my phone at to the onstar or any of that I don't know if I have satellite radio there is no auxiliary plug in heated seats it's only the back of the seat that works I'm not sure if that's all that is heated and it says that it's supposed to be come with a key fob I did not receive my car completely dies I have to turn it completely off turn the key around and started again the whole steering column looks like it has been replaced I did not receive the key fob I cannot lock the doors because the keys don't work in the door but they do an ignition sometimes I have to turn the key around sometimes even when I'm in the middle of driving I have to cut it completely off because it will stall out turn key around and it start it again. I have no idea what the real milage is. Jelp im a single and only in come parent to 3 bous and this momma needs help please.