Purchase contracts

[Bamasuper]

A persons agrees to purchase several pieces of furniture and signs a
contract for the goods. During the night, the person determines that they
do not want all of the furniture. Is there any provision for the person to change their mind within a 24-48 hour period of time and void the contract?

I purchased an "as is" minivan from a small car lot. Because it overheated on my family's first time out, I took it to a mechanic. Per multiple mechanics,
the vehicle needs thousands of dollars of major work to correct the
overheating problem, as well as other major problems (transmission, engine,
computer/check engine light) most likely caused by the state of the cooling system. Does "as is" mean that a dealer can sell a vehicle that doesn't even last a week? Isn't there some kind of stipulation as to a minimum level that "as is" has to meet? Does the fact that it has a brand new inspection sticker (with no way it should have passed state inspection) and no check engine light stipulate fraud? Do I have any special recourse with this having happened in "The Commonwealth of Virginia"? Thank You