Yes, there are DVD/VCR combos available for the use in automobiles.
yes, DVD/VCR can be used with a HDTV. anonymous@oola.com
Yes, Sony makes several versions of a DVD/VCR combo. These include progressive-scan DVD/VCR combos and DVD recorder/VCR combos. The latter is capable of copying VHS content onto DVD.
Most VCR/DVD combos come with a remote, and can be programmed to work with your TV remote.
Yes, you can still purchase new DVD and VCR combos. You can buy them at http://www.amazon.com/Philips-DVD740VR-DVD-VCR-Combo/dp/B00006ANZ7
While they make DVD/VCR combos that will play DVD-R and DVD-RW, there does not appear to be a DVD/VCR combo with a DVD writer available for purchase.
Yes, upscaling DVD/VCR combos are available for purchase.
vcr out into DVD in, DVD out into tvhd in
Yes, but you will not have HD quality
There are upconverting dvd/vcr combos,but they don't upconvert the analog signal of the VCR.
Yes Haier makes one that is 19 inches.
All JVC VCR's use the same heads and so will give equal playback quality when hooked up to a HDTV.