Welcome, dream of mine (nice name, btw).
You are a girl, and while it may not help you at the dealership, but perhaps you can try diagnosing some issues yourself. You already joined this forum and asked for help - that's a big step.
I don't know if the car is in your possession now or the dealers, but if you have the opportunity now to look under the hood, it can be quite helpful and may save a lot of money. If you want help with that, let us know and we're more than happy to help diagnose the issue and walk you through fixing it.
Like MagicRat said, rebuilt PCMs are available online. You may need to specify the PCM version. It is a 4 character identifier, usually located between the driver side door and the body.
If the PCM really is the problem, it's easy to replace yourself with minimal tools. But I really suspect something else is the problem. Check for what's lacking first - fuel or spark. Turn the key to ON, listen for the fuel pump to turn on for a few seconds (whine from the gas tank). If that's working, then check for spark. Might take a bit more work with a multimeter if you can get one, but worth looking into before spending the money on the wrong part. Take it to a trusted mechanic for a second opinion before buying anything if you can't figure it out yourself.