My advice is, if you have a larger area to do, get the paint made up in a spray can. For clear coat, you can even get a 2-part in a can with a one-time use button on the bottom to mix the parts. The Ford touch up paint I had was a poor match and quality and, for not much more, I got a whole can of paint (of course, clear was extra). I also had a quart of non-spray can made up for my old Legacy, which was a medium blue metallic with clear as a 1-part. Used small art brushes to touch up spots and, once polished up, was a dead match. Of course, these were small spots, so any metallic mismatch wasn't noticeable.
I would only use the official toyota track bred color. I'm going to try and get in touch with a my dealership to see about ordering it. It's only a rock chip in the front, about maybe an inch. Hopefully wouldn't be too much to just get that fixed.