Yes
If you are training to become a dolphin trainer (or any wildlife trainer) you have to make sure you treat the animals right or then they will not love you and they WILL attack you. :)
it is recommended.
depends on what animal you want to train for a living if a dog trainer no or any animal that don't swim on a average base sis you don't need to. if you want to be a exotic animal trainer example dolphin trainer it would be best if you know how to swim if you need to be in the water to train it.
Science education is needed. Also 2 years needed of college.
None, go to a gym and learn from a trainer
Becoming a personal Trainer and getting the education for it will depend on what type of personal trainer you want to be,, i would first check with your locat gym and see if they can give you any guidance.
That really depends on what kind of animal trainer you want to be, I've met horse trainers that as far as I know only have all the time they've spent on horseback as education. I've never heard of any type of education or cretification needed to train animals (I can imangine that somewhere in the world thinks it's called for) to be an animal trainer what you need is the skill of training an animal.
you needed 4 years of animal college and must be good with animals
A personal trainer normally goes to school to get a degree in physical education. You can start by working in a gym to get the experience working with people.
If you are interested in becoming a fitness trainer, you should first check your local community college for couses. The local community college can provide the education you need.
To become a personal trainer, you should be able to choose between taking active classes or getting an education through the internet. However, you can find more information about this on the wikipedia page.