The problem here is simply that you are trying to install what you do 
not have the required dependencies for. The problem is not Wheezy 7.3, 
dpkg/apt nor TDE.. What is on these dvd's is not enough. It does not 
matter whether you use apt-get or aptitude.

If you can't network this box to the repos all you can do is identify 
exactly what packages are missing, download them from another networked 
box to a removable, then transfer them to /var/cache/apt/archives.

> The following packages have unmet dependencies:
>  kde-trinity : Depends: kde-core-trinity (>= 5:47) but it is not going
> to be installed

Clue: find out why kde-core-trinity won't install and work back from 
there. I have had to do this many times, working with TDE and Debian 
Sid. Good luck to you! It will be hard work.

D