This depends on the particular model. Some DVRs have DVD players built in, and some do not. By itself, a standalone DVR (Digital Video Recorder) without a DVD drive built in cannot play a DVD.
If your DVR has a built in DVD player, yes.
There are several DVD recorders that come with DVR capability
Yes, you can find dvd/dvr combos at most major electronics stores.
You can connect the output of your DVR in a DVD recorder, such as the Samsung DVD-VR375. This will record your DVR programs directly to DVD.
Run component cables (red,whit and yellow) from the DVR "video out" (yellow) to the "video in" of the DVD recorder. That will send the picture to the DVD recorder. If your DVR or DVD recorder does not have the yellow video out or in as described, use the "S video" out of the DVR to the "S video" in of the DVD recorder. The red and white jacks are for sound....out of the DVR to the audio in of the DVD recorder.
Yes, you can do this. You hook up your DVD recorder up directly to the DVR.
Some cable / satellite providers let you rent a unit for about 10 dollars / month. You can also purchase a DVD disk recorder with a built in hard drive which acts as a DVR though those units are disappearing. Tivo is a DVR.
There are numerous HDTVs that have built in DVD players. Some include the Viewpia LV-26IEA6 (26") and the Sanyo CE19LD90DVN-B (19"). HD Ready TVs with built in DVD players can also be purchased. http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=HDTV+built-in+DVD&x=0&y=0
You can purchase a TV with a built-in DVD player online from stores such as Best Buy. You can also find TV's with built-in DVD players available from retailers such as Amazon.
DVD and Blu-ray
Some of them.