I have a fireplace that was given to me. I want to use it as a wood only to save on my gas bill but I dont ?

If there are gas lines and a burner then it is going to burn a gas, if there is simply a pit with ceramic tiles then it was made for burning wood. Another good way to tell if it is a wood burning fireplace is to look for a flue or damper handle below the burning cavity so you can adjust the air flow to the fire. If you do not care about the look of the chimney, and you research fire codes and such, and your a little handy, you could probably do it out of metal exhaust tubing (ductwork) but it would look ugly as sin and you would have to make a hole in your house hehe. We have one in the garage, so we don't care about looks and it just vents direct to outside through sheet metal like exhaust tube, which was very cheap, then just sealed up around the hole with concrete. As to your details, well, to burn wood you really would want to have that damper/flue to be able to burn the wood easily