How much can I expect to pay in Texas for having a tooth oraly removed? Rear tooth on bottom.

I don't know the fees in Texas but it would depend on whether it's an easy extraction or difficult. An exam and x-ray fee would probably be added to your bill too if you are being seen on an emergency basis.
You can call around to dental offices and ask for the cost but be sure to get the total cost and not just the extraction cost.
Good luck.