Can I merge two Apple ID accounts to consolidate music purchases?

Question

5 or 6 years ago I created an Apple ID. And then purchased itunes songs a year or so ago. Later, this past year, I disposed of two old PC computers, and was later traveling traveling many months. When I returned, I could not remember my Apple ID, and I could not reset that info because, as I discovered later, the email I had used to create my original Apple ID was now obsolete and unobtainable. So i created a new Apple ID at an Apple Store, and this became my new account.
I only recently returned to iTunes to make some new purchases, and the computer I had last used to access iTunes a year ago had my "old" Apple ID. And there are maybe 10 itunes purchases associated with the original ID.
I want to abandon the original ID, and going forward only use the new ID I created at an Apple Store, because it is linked to a useable email account, whereas the original email account does not exist any longer.
(1) Can I merge the old ID and its purchases into my new ID, and then abandon the old ID?
(2) If not, is there any other way to pull my music purchases inot my new ID?
(3) Re: Authorized machines that can play my itunes purchases: The purchases associated with my original ID had been authorized to play on the two PC computers I also got rid of... I did not have any thought at the time of getting rid of them "oh, i better first deauthorize these machines so I can reassign two of my machine authorizations to other computers ar a later date"... So now I have two authorized machines completely unavailable to me, and those two machine hard drives had been wiped clean before I got rid of them.
So: is there a way to reclaim those two defunct authorizations, so that I might use them on other machines of my choosing?
Thank you.
G4-MDD   Mac OS X (10.4.8)  

Answer 1

1 - No
2 - No
3 - When you get 5 authorizations, you can Deauthorize all 5 and reauthorize what you need.
See this -> http://docs.info.apple.com/article.html?artnum=93014