I want to acknowledge that's it's good of you to volunteer your time, and to say I am really grateful for your answer. I just spent 3 hours searching for it, and it did not occur to anyone else.
I am troubled by the condescension. Perhaps as someone who has been helping people on this and other forums you have encountered a lot of people who were unwilling to make much of an an effort to figure things out for themselves. (When I worked in an emergency room I got that impression at times, though sometimes I got it wrong.) But I don't think this answer could be seen from the perspective I had.
I have been using iTunes on a PC for 10 years, but have never used any other Apple product until I got an iPad 4 months ago. I have used the iPad daily on the internet and listening to music, but have never used Safari, nor iTunes, until today when I bought a song. When I didn't see the sidebar, I figured it was part of iTunes 11, and that there would be a button somewhere to reveal the sidebar. It certainly did not occur to me that Apple separated iTunes for iPad into 2 entities. Nor did it occur to me to look for a pre-installed music button, and had I seen it, it would not have occurred to me that it housed a music player. There was no button for the music player I do use until I created one.
Your suggestion to check the manual was also helpful, and would have given me the answer I needed. I had down-loaded it initially, then forgot about it. But I don't use manuals for anything anymore - my TV, satellite, DVR, phone, or iPad - because it takes too long and is sometimes fruitless. I find it's quicker to Google the question, and to use forums.
I concluded this was part of Apple's streamlining iTunes, and that if I wanted to see my library I was expected to do that on my PC.
