Passenger door lock is stuck

[RMcG]

I want to make a replacement key without paying an arm or leg for it. As far as I know, the key has no chip in its head. It has no keyless entry, etc. and I have no awareness that there is a chip in the key. But I called a local hardware store here and they said it still might have a chip in it. The key does have a think black plastic head, but there are no button or anything on the head. Apparently if there is a chip in the ky it is much more expensive to make another key.

Edit: I have looked at the owner's manual and I do not think I have an engine immobilzer system; this is the cheapest Toyota Yaris you can buy. I think it came with 3 master keys that are all th same.

QUESTION: Is there any way to tell if there is a chip in the key?

Thanks,

R.