No its impossible
A DVD player cannot play a BluRay disc. A BluRay player can play both BluRay discs and DVDs.
Yes, BluRay DVD players also play non Blu-Ray DVDs with no problem.
DVD players cannot play Bluray discs. The lasers and the data storage are different so no data can be read from a Bluray disc in a DVD drive. That is the case whether or not there is any up-scaling available in the player. Bluray players on the other hand are quite happy to play DVDs as well as Bluray discs.
No
Yes
No and HD DVDs have been permanently discontinued
A DVD will play on the computer because the computers are made to play DVD's. The Xbox 360 will not play DVD's because they are made to only play BluRay discs.
DVD players and drives cannot handle Bluray discs, whether recording to them or reading from them. Bluray players and drives on the other hand can use DVD discs as well as Bluray discs.
A region 1 DVD is intended to be used in North America. Any BluRay player purchased in North America should play the disc. Bluray players from other regions such as Europe will be expecting to play discs marked with a different region code so are unlikely to pay a region 1 DVD.
Beacaus bluray is newer and they think everybody has a bluray player... eventually it will come on dvd.
To play a high definition DVD, you need a high definition DVD player. There are two types available currently. HD DVD, developed by Toshiba is one and BluRay, developed by Sony is the other. They are not compatible, so an HD DVD will not play on a BluRay player and a BluRay disc will not play on an HD DVD player. BluRay looks like it is the winner in the format war between the two companies over the last years so it is likely that Toshiba's format will disappear in the coming months. Note that HD DVD can refer to the Toshiba format but it can also refer to high definition DVDs in general.
Currently, no. You should get a PS3 to do that.