Is a 2012 Ford Focus affected by the Powershift dual-clutch transmission problems?

Not all cars with the Powershift have been affected, but many have and it’s impossible to say yours won’t be at some time. If the deal with your dad is a good one, and it seems as though it is, then it’s probably worth taking the risk. If you can feel any shuddering when you drive it then it’s likely you could have a problem; if you don’t then you could be in the clear. It’s not really dangerous to drive it, but it is annoying.