A:
Both my new Kindles have a back-lit screen (with adjustable brightness) so they don't need a separate light. Brighter light = slightly faster battery use.
Some electronics stores take electronic items for recycling, or check for recycling centers near your zip code with your municipality (city, Twp., county).
All my Amazon books appeared on my new Kindle when I registered it with Amazon as mine. Copies are still on my 1st Kindle, too.