Learning Ruby and Ruby on Rails

The obvious starting point is http://www.ruby-lang.org/en/documentation/. There are plenty of references to online resources that will get you started. There is also many books on the subject. I chose the following two titles to kick things off:

Programming Ruby: The Pragmatic Programmers' Guide, Second Edition
By Dave Thomas, Chad Fowler, Andy Hunt

Agile Web Development with Rails, 2nd Edition
By Dave Thomas, David Hansson, Leon Breedt, Mike Clark, James Duncan Davidson, Justin Gehtland, Andreas Schwarz