Well I have to head out. So I will get this started and someone else can help you along. You have two versions of Ubuntu in that list and the last three lines are wrong.
Oneiric is Ubuntu 11.10
Lucid Is Ubuntu 10.04
And these lines are all wrong.
Look at the bold italic I underlined above in black.
<DISTRIBUTION> should simply be the version of your Ubuntu without the < >
<oneiric - I explained above that you had two versions of Ubuntu in that list. However this has a < there as well, and it shouldn't be there, It should be a space not a <
So you really need to let us know what version of Ubuntu you are using.
Edit: I just noticed this as well,
Is in there three times. And it is the only one that has Lucid in it.
So your /etc/apt/sources.list should look like this, assmming that you are using Ubuntu Oneiric 11.10.
What you need to do is open the terminal and type in
sudo nano /etc/apt/sources.list
then your password
then delete all that is in there and copy the above corrected sources.list to it. BUT ONLY IF YOU ARE USING UBUNTU ONEIRIC 11.10. Please check that first.
after you do that
then hit ctrl o (at the same time) then hit enter which saves the file
then crtl x (at the same time) this exits you from there.
then do sudo apt-get update