Can I use an attenta for my tv I don't have cable

Go to menu or settings and make sure you are on the cable or local setting.

You could purchase an antenna and get the local stations

That will depend on what sort of antenna you have. Radio Shack will have a flat wire to F connector if that's what you need. if you are in a urban area, I'd suggest a leaf type antenna. I personally use Mohu brand amplified ones on each tv. No more cable bills,

You need a antenna HD for air signals. I hope this helps. leave feedback and thank you

I am still using the antenna I fitted 25 years ago and it works fine for my flat tv, most new antennas will say that they are good gor hd tv, internal antennas normally have a cable built in to connect to tv but outdoor / loft ones require cable. Some homes have a wall socket for antenna feed but you need a cable to go from this to the tv.
Hope this helps

Hook up your rabbit ears and auto tune the TV and see what happens.

You can buy an indoor antenna or you can mount one on your roof top. Find auto programm in the setup menu of the tv. Select antenna not cable and select auto program. The number of stations will depand on location. You may have to rotate the antenna. If this doesn't get you more than 3 stations you may have a tuner problem and need to replace the main board in the tv.

Yes of course you do. It goes on the RF coaxial jack (the same one that cable TV would connect tto) labeled antenna. Don't let anyone sell you a special expensive "digital antenna" because digital TV uses the same frequencies that UHF has always used and thereby requires the same antenna, or at least the smaller portion of the older antennae.

You need to go into on screen TV tuner/channel scanning setup page and change the signal source from CABLE to ANTENNA so it will scan again to pick up off the air signals. Please read the TV user manual for more details.
What is the model number of the TV?