What happens when your car freezes?

my car has been parked outside the house for 4 days unused. as you know the freeze hasnt even started to thaw its worse! its a ford ka2. i scd all the snow and ice off the car got in and it wont start!! cant lock the power lock now either as there is no power! i only bought the car last week and forgot to ask if there was antifreeze in it! im hoping its the battery but if its frozen what do i do? thankyou in advance