I made my buddy an administrator - and now, I can't control the blog. Who do I contact to get this corrected?and
I was reader of a blog which is now private. Can Blogger provide me contact to the blog owner?Not everybody realises that Blogger does not provide blog access / membership control.
Though Blogger / Google is theoretically responsible (to a very limited degree) for content of the blogs which they host, access and membership control of any blog is the responsibility of the blog administrators / owners. And control is ownership.
If you provide your friend control of your blog, and your friend removes your control, the blog is now your (former) friend's responsibility. Blogger will not help you regain control, either.
If you want access to a private blog, Blogger won't help you there, either. Blogger supports our desire to publish a blog anonymously and in complete privacy - and if we (or anybody else) publishes a blog privately, they are responsible for proving contact information.
If you lose control of your blog, by forgetting the owning account name / password, and losing access to any backup tokens, you have lost control of your blog. Hoping that a responsible owner still exists, Blogger will retain the blog in question, until a responsible owner shows up. Threatening a lawsuit, because Blogger has stolen your blog, is frivolous misuse of court time.
In neither case, will you do anything but waste time, by posting in Blogger Help Forum: How Do I? and demanding personal attention, from a real person in Google.