Start here: http://www.sheldonbrown.com/english-3.html

The most complicated bit on your bike is the 3 speed hub, and there are a ton of web pages devoted to servicing Sturmey Archer hubs....but leave it alone for now! As non-fixie said, start with cleaning, polishing, oiling etc.

Those brakes act that way - Sheldon will have an article on how to adjust them. The skewed handlebars are easy to fix - loosen the nut at the top of the stem a couple of turns, give it a sharp tap to free the wedge down in the stem, and simply straighten up the bars.....then tighten it all back up.

Nice bike - it will clean up well.