Ahsoka Tano's fate is unknown; she left the Jedi Order at the end of Season 5, so her odds of being killed during Order 66 are highly unlikely, but there's no solid evidence of that yet
No, In one episode she dos die but then comes back to life but she does NOT die. (I have watched that episode so I know) :)
No
The answer is yes
mr pink
Rex's fate has not been confirmed as of yet, just like Ahsoka. So we'll have to wait until the Season 3 finale of the show airs on Cartoon Network.
yes
"Orders"
Dengar didn't die in The Clone Wars. You might have it confused with someone else
only in the new series
Echo did not die in clone wars he showed up in season seven
No. Count Dooku dies in Revenge of the Sith.
Captaian Rex apears ONLY in Star Wars The Clone Wars in bothe the movie and show.