Personally, for starting out I'd use Jgrasp. I used it for my javascript class at college this year and our teachers recommended it because the debugging interface is much better than eclipse's. Eclipse however has lots of neat shortcuts that make programming much easier. Personally, I'd learn how to use the language correctly without external help and once you know how to debug your code properly, make the switch.
As far as learning the languages, there's lots of free videos.
I would personally recommend this book for learning:
http://www.amazon.com/Building-Java-Programs-Approach-Edition/dp/0136091814/ref=sr_1_1?ie=UTF8&qid=1342625229&sr=8-1&keywords=java+back+to+basics+approach
It's what we used to learn Java at my school. It's an object late approach to javascript and it's really well laid out and everything the book teaches you is incremental, easy to understand and builds on itself over time giving you a well rounded view of javascript.
(I got mine for free online from some textbook downloading website, I'm sure there are copies floating around the net if you don't want to shell out 90 bucks).
http://en.wikiversity.org/wiki/Java_tutorial
There's also wikis like this one I've seen that offer much in the same material as a textbook but for free.
