Generally, yes. A BD player is "backwards compatible", meaning that, in addition to Blu-ray disks, it will play regular DVDs and audio CDs.
Yes all bluray drives will play cds.
Unlike DVDs, Bluray discs and most games, CDs are not region coded. CDs from any region will play in any player.
Yes. Some Blu-Ray players can even play photo CDs and some can even display data on SD cardsAll players can, but not the very early ones (the first ones were manufactured in 2006)All Blu-Ray players can play DVDs and CDs
Yes, the Toshiba C55T does play the bluray.
PS2 uses DVDs they only look like Cds used by PlayStation and the Bluray discs used by PS3
A DVD player cannot play a BluRay disc. A BluRay player can play both BluRay discs and DVDs.
No
CDs, DVDs and BluRay discs all work in similar ways. The primary difference is the data density on each disc. CD is the lowest density. A DVD can store several times the amount of data on the same surface area and BluRay will store several time the amount of a DVD.
Wii doesn't play CDs.
Yes, BluRay DVD players also play non Blu-Ray DVDs with no problem.
No. You need a BluRay player that specifically says it can read 3-D disks
Short Answer: NoA stock PS2 will play PlayStation games, PlayStation 2 games, DVD movies and audio CDs. That is all. The PS2 homebrew community, however, has developed SMS player that has the ability to play Divx, Xvid, and mp3 files.