Here I come

I am so determined to use Ubuntu that I paid a professional to install it for me (dualboot). When I got it I got a lot of things from the software center. Skype did not have a download button so I googled it and Ubuntu help told me to do this:

sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

and then this:

sudo apt-get update && sudo apt-get install skype

The terminal told me "that this is potentially harmful..." but I thought it was Ubuntu language meaning "are you sure?"

Now items cannot be installed or removed until the package catalog is repaired, so I want to repair it but the package operation fails.

"sudo aptitude -f install" -> command not found

Synaptic package manager tells me that I have two broken packages, libc6 and libc6-dev but doesn't help, only makes life complicated.

What the *#$%&!!! I don't want to be forced to become a computer scientist just to be able to use a free source os.

P.s. the sound stopped working