I have an old RCA color track plus no remote need aux

Solution
Universal remotes come preprogrammed with codes but there is usually no way to add codes. RCA has made a lot of TVs so it's hard to know which will work. The Logitech Harmony remotes are programmed on the net and they have most codes but aren't real cheap. You could try to google the model of your TV + remote and get a replacement.
On some older TVs you can get to the AV input by using the channel down button to go below channel 2.
Universal remotes come preprogrammed with codes but there is usually no way to add codes. RCA has made a lot of TVs so it's hard to know which will work. The Logitech Harmony remotes are programmed on the net and they have most codes but aren't real cheap. You could try to google the model of your TV + remote and get a replacement.
On some older TVs you can get to the AV input by using the channel down button to go below channel 2.
 
Solution