How do I install upstart?

Your sources.list file contains a mixture of lucid and maverick sources

for example

deb http://security.ubuntu.com/ubuntu lucid-security main restricted

and

deb http://security.ubuntu.com/ubuntu maverick-security main restricted

I would recommend you replace the contents of sources.list with the recommended list (see linked question below).

Change all references for "maverick" with "lucid"

Then reopen your sources.list and change the download server to the nearest country where you are currently based.

finally run

sudo apt-get update && sudo apt-get upgrade

to ensure your repositories are successfully sync'ed

Linked Question:

Related