Can we claim money bank

macman

Kellycoulton said:

Thanks for confirming what I already thought. It was a trader advertising on ebay. I'm not sure of the particulars of the car, or the advert, however the many faults found at the garage certainly were not advertised

The seller doesn't have to declare any known faults. they simply have to be truthful when asked. And the car must be roadworthy. and fit for purpose. 
You cannot expect a £1500 banger, probably ten years old or more (?) to be free of faults. As pointed out above, context is everything, so without knowing the age and mileage of the car, and the alleged faults, it's impossible to say if your dad has a case for a refund.
NB: not sure if ebay will provide any protection here, as the OP's dad is stated to have paid by bank transfer, not via Paypal? There will be no protection if the sale was conducted off-site.