No you can not.
Usually when you start up minecraft on an update release date a gray box will pop up asking if you would like to update minecraft xbox 360 edition ,then answer yes i would like to update then there you go your minecraft is updated.If you were wondering about the update we xbox people are a few updates behind.Currently minecraft xbox 360 is on 1.0.1 ,not to far away from 1.5.
no
Currently, the Xbox 360 version of Minecraft is running 1.6.6 beta. This update came out before the adventure update of 1.8. It will take a while for the Xbox 360 version of Minecraft to catch up to the PC version of the game.
Yes, in a later update
Not now but they will be if they ever update it.
the end update april 5
yes, it had the end update on release
they estimated by the begining to middle of this summer
After a big update.
during mid to late october
Yes in the next update