If it's a new car, you'll need a valid US address and/or driving license.
I don't know about buying life, but you don't have to be a citizen to buy property.
Yes. A person does not have to provide proof of citizenship to purchase real property in the US.
see you in jail!
No
yes
no
Yes, a foreigner in a new country can buy, sell, or trade personal possessions. If the foreigner came to a country with possessions, the person keeps them-- unless it would damage the country's ecosystem.
No, you have to be a US Citizen.
no
You can buy a car for that much money.
No.