As said above, there is no need for you to run the whole way. Get some headphones, put on some tunes and pace yourself. There is no answer to your question as no one here knows your physical condition.
Get a heart rate monitor. Eventually as you build your endurance, you can set goals to to be within 65-70% of your max heart rate for 45-60 minutes. To figure this out you can use the following formula.
(220 – your age) * .65
(220 – your age) * .7
Example for a 22 year old:
(220 – 22) * .65 = 128.7
(220 – 22) * .7 = 138.6
In the example above, a 22 year old's target heart should be between 129 and 138 beats per minute for 45-60 minutes.
Obviously you want to wear comfortable running shoes.
Don't eat right before your run. I've found that doing cardio first thing in the morning upon awakening is the best for fat loss, but it's not for everyone. Running on a completely empty stomach is not easy, and it can be dangerous if you're hyperglycemic or diabetic.
I would experiment to see what works best for you, but on your first couple runs get a meal in 2 hours before you go out.
Eat something with a complex carb source, (whole grain bread, yams, plain oats, sweet potatoes, brown rice, etc) and a lean protein source, (turkey, lean chicken, fish) or if you don't eat meat, (broccoli, almonds, etc). Stay away from simple carbs, simple sugars or food with very high fat content, (white bread, white rice, etc).
On your way home, don't eat your bread while running.
But if you're just going to walk then you can enjoy your bread.
Oh yeah, and bring a bottle of water. Above all, try to enjoy yourself, don't stress out about trying to get a good exercise. Any type of physical activity is better than none at all.
