Re: Am stuck with 3 problems....... :(
1. Never come across that before, sorry. It's always just worked for me with the default Pulseaudio system.
2. Open them with your web browser. Seriously, it works.
3. http://www.skype.com/en/download-sky...-for-computer/ and choose "Ubuntu 12.04 (multiarch)".
When it has downloaded, double-click its icon on your desktop and it will open Ubuntu Software Center. CLick Install, type your password, wait a few moments and it will install.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.