need help- coax ? in henderson/las vegas 89052 newbie

[perrodulce]

Hello, I'm sorry but I am brand new on this forum, so please forgive me if someone has posted this already. I am wanting to cut Cox cable and just use an antenna but continue to supply my 4 televisions throughout my 1 story house with the signal. Can I use the existing coax cables? If so, do I need anything to convert them to use for the antenna? Can anyone recommend an antenna and also where to mount it for my area? One last thing, I also have telephone and internet through Cox, will this cause a problem in trying to use the coax? I believe they told me the modem coax is a different line than the tv, but I'm not sure. Thanks so much, all help is appreciated.