Yes There really is not a PS1 it is just the name people use for the Playstation so that they are not mistaken for PS2 or PS3
No the PS1 can not play PS2 games
Yes it can
No toolbag!!
Yes
you cant
No PS3 games do not play on a PS2
NO
No. I've tried (>_<)
Nope. Not by itself. You can buy ActionReplayMAX adn choose the FreeLoader option which will let you play foreign games on your US PS2.
you cant a ps2 does not play online games
You Can Turn Them Back
No, PlayStation2 games can not be played on PlayStation3.
No, not on the last console made. But you can play to almost all your old PS1 games.