|You can't convert it to play DIVX movies as it requires DIVX playback software and/or hardware which can decode DIVX content.|
It cannot play all DVDs.
For commercially-made DVDs, only those which match the region-code of the machine.
For home-made DVDs, only those which have been made properly using DVD-creation software, or recordings made on a DVD recorder. It might also matter which type of blank discs you use (ie DVD-R or DVD+R).
That should be explained in the Toshiba user manual.