Hi,
I have been looking for ways to install emacs24.5 or emacs-snapshot but I have been unable to do it.
I am new to debian -sorry everybody 
- but I have been using arch for a while.
I found and added the repo for emacs-snapshot but I can not install any dependency.
If someone can point me to some instructions… Thanks in advance guys
Hi many,
goto https://packages.debian.org/sid/amd64/emacs24/download
scroll down, download eg emacs24_24.5+1-6+b2_amd64.deb (eg for x86_64 architecture)
and simple doubleclick it 
You can add the backports repository, which has an up-to-date version of emacs24:
https://backports.debian.org/Instructions/
If you want to get all the available backports, you can go into Synaptic preferences and temporarily set the Distribution choice to “Prefer versions from” backports, then mark all upgrades.