Yes, Apple Safari
Yes! the internet on the iPod touch is free no matter what generation :)
An iPod touch has an internet browser.
it is the web browser. if you have wifi go to safari on the ipod touch and surf the internet.
yes
yes
No, you cannot get Mozilla Firefox on your iPod Touch. The only internet application available for the iPod Touch is the app called 'Internet', which uses Safari's web browser style converted into a mobile format for the iPod Touch and iPhone.
Yes YouTube can be watched on a 4th generation iPod Touch even in the Safari web browser or in the YouTube app.
Safari, or as labeled on the iPod "internet", is an internet browser specifically designed for the iPod touch that allows you to surf the web from your iPod Touch via a Wi-Fi connection.
Yes!
No, you cannot control an iPod Touch through the internet. However, the iPod Touch does have the ability to go onto the internet, if that is what you are asking. You can do a remote-wipe if you sign up for a Mobile Me account and the iPod is a 4th generation iPod Touch, but that is the best you can do.
The iPod nano cannot have apps.
yes, very easly[safari wb browser]