I had a iPad and still have an Ipod but have decided to go over to android devices and move totally away from apple. I have hundreds of dollars worth of songs and movies purchased from itunes. My old computer that I had itunes installed on crashed and I can't seem to figure out how to reload itunes on my new computer with my previous purchases. and even if do, how do I get my purchases from itunes to my android phone, galaxy tab or even new computer? Anyone help?

please speak sloooowly, as I am technologically challenged