I've heard that cardiovascular exercise can prolong life, is this true?
Your heart is only good for so many beats, and thats it. Don't waste them on exercise. Everything wears out eventually, speeding up your heart will not make you live longer, thats like saying you can extend the life of your car by driving it faster.
Want to live longer? Take a nap.

Should I cut down on meat and eat more fruits and vegetables?
You must grasp logistical efficencies. What does a cow eat? Hay and corn. And what are these? Vegetables. So a steak is nothing more than an efficent mechanism of delivering vegetables to your system. Need grain? Eat chicken. Beef is also a good source of field grass (green leafy vegetable). And a pork chop can give you 100percent of your recommended daily allowance of vegetable products.

Should I reduce my alcohol intake?
No, not at all. Wine is made from fruit. Brandy is distilled wine, that means they take the water out of the fruity bit so you get even more of the goodness that way. Beer is also made out of grain. Bottoms up!

How can I calculate my body/fat ratio?
Well, if you have a body and you have body fat, your ratio is one to one. If you have two bodies, your ratio is two to one etc.

What are some of the advantages of participating in a regular exercise program?
Can't think of a single one, sorry. My philosophy is: No Pain = Good.