First off, I am assuming that by HD you mean High Definition, not Hard Drive.
Yes, and you will probably pay less that you would for an HD DVR, but you may have to start looking at used machines to find one. Most new DVRs are HD-equipped.
Yes, just use a HD DVR with an internal tuner.
You can buy an HD DVR receiver straight from your cable provider. You can also find them at electronics stores. They are also available online at websites like amazon.com.
YeS
A high definition DVR upconverts non-HD content to HD. Also, it can store HD videos on it's large capacity internal hard drive. You should buy one of these.
There are several companies that provide direct TV, with HD and DVR. DirectTVPlus HD DVR offers a service where you can record, watch, and delete shows in any room, with just one HD DVR.
Yes.
If the operating system is compatible you will be able to connect the Touchsmart to a HD DVR unit.
You don't technically need an HDTV to use an HDDVR, but you won't actually be able to see the shows in HD if you don't have an HD TV. It seems pointless to pay extra for the HD feature when you can't even use it.
The Comcast HD DVR to some is not reliable, many have switched services or started using Tivo, which has been around for a lot longer and is the best.
Call Corporate at 1800 531 5000 and ask to upgrade your box. its 200 for an HD DVR, 100 for both the HD and DVR seperate, and 70 for the Standard Box.
HD DVR directv is a service provided by the cable provider, directv that offers the ability to record HD quality TV. If you are in the American, Latin American or Anglophone Caribbean area then you will likely have access to this service.
Yes, you can record true HD with a DVR, provided the DVR supports high-definition recording and is connected to an HD source, such as an HD cable or satellite service. Many modern DVRs can record content in 1080p or even 4K resolution, depending on the capabilities of the device and subscription plan. Ensure that your storage capacity is sufficient, as HD recordings typically require more space than standard definition.