Hmm, it is a laptop, so you probably want to use Suspend when you snap the lid shut. Therefore you should set the swap size to at least 2x RAM size....
Actually 10.04 is EOL as well. Use 12.04 for an LTS.
On a laptop that old installing regular Ubuntu is going to be agonizingly slow. Do give Lubuntu...
You probably didn't check the box to install third-party media plugins at installation. Depending what media player you're using it will give you the...
I would be the wrong person to advise on PPAs as, against current thinking in Ubuntu, I don't believe they are such a good thing. IMHO your best bet...