Yes, you can have music on a psp. You could download music, or, sometimes, the music is already there on your psp. So, of course you could have music on your psp.
Yes you could unbrick a psp 3000 and 3000 slim
No, but the psp go has bluetooth built in. All standard psp's do not, you could buy a psp bluetooth dongle.
the psp is better than wii because psp could download games
my psp could not internet play
yes it could usin the skype program on the psp
You can update your firmware using wifi in the settings at the top, or better than that you could mod your psp and install ultimate psp tube.
No you can not play the PS Vita games on a PSP.
They're different shapes at the back, but presumably the smaller PSP 2000 could be fitted with a PSP-1000's outer shell.
The PS2 console is, if a PS2 game could be run on a PSP the battery would not last 5 minutes and You could not hold the PSP from the heat of running the game. I have both (PlayStation 2, Psp 1000, and Psp Go) and no doubt the Psp is by far more successful, has more features, and on occasion better graphics.
You could try - but it'd take hours. The PSP's wireless is not fast.
The internet on a psp is good, but sometimes it could be really hard to use. To get WiFi on the psp is really easy though, but overall yes,