1. Transmission is great. Should have come installed with Ubuntu
2. Rhythmbox is basically iTunes
3. Audacity works on Ubuntu as well.
4. Isn't banking online? So I'd assume Firefox.
5. Evolution Email Client
6. XChat works great if you want a GUI. Irssi if you're not too afraid of the command line.
7. All that's online I believe, so your browser would work well for this. Movies though, Totem Media Player should do it...I never have gotten it to work, but I'm lazy.
8. Mozilla Sunbird
9. Hmmm...I don't know about the gaming. You could try a virtual machine or wine for that
10. I believe Pidgin can do that.