You can't delete playstation network from a psp.
Yes all you need is a psp
you sign up and it's free on a psp
yes
Yes it is
No Live is a Xbox network the Playstation products use PSN or Playstation Network
No. There are no extra costs or fees on the PSP Go (or any PSP) The only money that is spent after purchasing is spent on Games/Videos/Comics from the PlayStation Network.
The Playstation Network does not charge a fee
you have to get a PlayStation network card and then go to the PlayStation marketplace
You can download games for the PSP on the Playstation Network, provided you have a PSN account.
Full PSP games can be downloaded from the PlayStation Network store. The PlayStation Network store is accessible via one's PSP where full PSP games are available for purchase and download.
Download the PlayStation Network Downloader and install the software.Sign in to your PlayStation Network account.On the PlayStation Network account management site, go to the 'Devices' tab and select the 'PlayStation Systems' link on the left.
'The latest', always.