First make sure that the TV/DVD player is on TV by pressing the Channel Up. (The channel up/down will rotate through AUX and any programmed channels.) You'll need the original remote or an universal remote that matches the Set-up function. Then press Set-up on the remote; it's to the left of Mute above Play.
Use the Up/Down arrows to navigate to Channel Setup. Press Enter to access the Channel Setup menu. Use the Up and Down arrows to select Auto Ch Programming and press Enter. Wait for the TV to scan all available channels. Afterwards, you can go back to the Channel Setup menu and choose Add/Delete channels. Press Set-Up again to exit the On-screen menu system.
Unless you have a set-top Digital-to-Analog converter attached to the TV, you will only get one of the few remaining low power analog stations, if you are close to the transmitter. This set only has an NTSC tuner. Most set-top boxes can be attached to the Antenna input and be set to Channel 3 or 4 or connected to the Aux input.
The Magnavox MWC13D6 was manufactured by Funai and the manual is available here: http://www.funai-corp.com/support/manuals.aspx
. The direct link to the manual is MWC13D6 is http://www.funai-corp.com/support/om/MWC13D6.pdf
I hope this helps.