Musical numbers that have been on Family Guy include: The Road to Rhode Island, You and I Are So Awfully Different, Bag of Weed, Freakin' FCC, and many many others
None, that I recall.
If you mean literally the 2 words Family & Guy, there's probably a great many songs. The only one that probably has the title Family Guy in it is the Family Guy Theme
The best place to stream the Broadway versions of Family Guy songs would have to be Youtube. By simply searching "Family Guy Broadway Songs", you can find a lot of different live renditions of popular Family Guy songs. Some of them even include Seth MacFarlane and others from the cast of Family Guy.
On limewire
No, David Hyde Pierce didn't appear on Family Guy. He did appear on The Simpsons as Cecil Terwilliger. He also appeared on Osmosis Jones.
They don't appear to exist but just Google Family Guy Song Books and links to sheet music appear.
No. He did not appear in Season 12.
Business Guy
There are a lot of songs that have been featured in Family Guy, far too many to list them here. Do you have a specific season or episode?
The Trashmen | Surfin' Bird
Family guy reruns appear on Adult Swim and TBS. If you have direct tv and have local stations. Check the CW. the Cw plays reruns. New episodes appear on Fox.
Strangers To Love