NEED A KEY

Deal I could not pass up, even with out a key (and hearing it run). We are here in Louisiana have not even began to see normalcy and I really need this car running ASAP. I have had several people tell me to he a key from Autozone or whatever and call a locksmith. Others have told me that a lock smith will not be able to program my key for me. I am just trying to go the cheapest route. I have lost enough and really do not have time to be playing games because I am a woman. Any help you can give would be greatly appreciated. P.S. Approximately what is this gonna run me?