New newbie meat here.

[why?]

What Scott said. Yea, special is a way of putting it. Those things were extremely expensive options.

Usually those vehicles also had engine immobilizers, which means the key had a chip in it so without that one key the car would not start. Odd that your car did not have that.

Originally Posted by Sephymuffins

I know for a fact the key I have is not the original key because 1) it doesn't have the Toyota symbol on it and 2) I actually have a security system in my car. On the center console near the emergency brake there is a tiny square that says "security" and it has a tiny little red bump above it that I'm assuming is a light.

This is what it looks like.

Because of the key I have now, I haven't even seen the security light come on at all. Like I said, it's lying dormant. Maybe I just got the 2007 Yaris that's special and actually has a security system unlike other ones? I don't know, but either way.
I'm thinking that if I get a new FOB key cut and programmed to my car I could use the security system. If I'm able to do that, I'm assuming the key I have now wouldn't be able to be used, correct? That could prove most useful.