I grew up with them. Cleaning is sweeping under/around cage daily and changing the papers at the bottom every day or 2. 1x a week, cleaning the cage completely and adding new papers.
I've had several that could talk. its not the most 'beautiful' voice but its cute as a kid to have a pet that talks to you.
intelligence varies greatly - I had a couple that could do tricks and 1 that was clearly 'challenged' I could keep him in an open strawberry container and he wouldnt get out. just didnt figure out to climb out.
They live in flocks and are pretty social so be prepared to really interact with them daily - ie, keep them in the main room of the house or get more than 1. mine used to do hw with me shower with me etc.
dd1 10/05
dd2 11/09
and 1 cocker spaniel