Need help with Fixing new Boxster

[Joji]

Hi,
I found a couple of things wrong with my new car. The back right tail light is out. I figured out how to open it. Do you have to buy the bulbs at the Porsche dealer or can you get them at Homedepot.

The light in the middle near the Convertible latch release works but is extremly loose. Anytips how to fix this.

On the stereo I only have dash speakers. I noticed that the high and hig mids come from the left speaker. And the low end comes from the right speaker. I have not looked into the stereo yet. So it might be set wrong. But is this normal for Dash speakers only. Remind me of old Beatle recordings.

Next is more serious. I notice the Horn does not work. Can I fix this or is this have to be done by a mechanic because of the airbag.

thanks