I bought a used car last week and I was told that ...

I bought a used car last week and I was told that all used vehicles are checked and inspected before sell, I trusted them and bought the car it was Nissa versa 2007.
Next day I had two issues with the car, first the air conditioner work non stop even when I switch to heat mode and second issue was the starter that failed.
I went back to the dealer to complain about the issues and ask to fix it. the seller told me that they re not going to fix it because it is a cheap used car and this is a risk that you take when you buy an old car.
I was really disappointed about his answer and now I have to pay more money to fix the air conditioner and the starter.