Hi Heva, just curious, did you find a car seat?
I have a 3 door car also (Celica), and am wondering what will fit in mine once I have a bub.
I was thinking a capsule (but have also read they take up room) and then get a front facing seat. I saw a girl the other day with a teeny chirade and she had a safe n sound unity capsule in it, and didn't seem to have a problem with that!