Angela,

Many of us still haven't completed the collection. Your best bet there is to have patience.

The Red Ball is an Easter Egg, and best enjoyed if you find it on your own, however, there are many hints in this thread on how to find it.

There is no set time limit on how long it takes to do anything, because so many people play in so many different ways, it can't be timed.

Answers to numbers 4 & 5 can be found here

Your last question is a simple one. Keep them happy and healthy and they will live a long time.