7:00 am - lowfat yogurt
10:00 am - banana
1:00 pm - 20 baby carrots w/lite ranch dip and a serving of orange juice
4:00 pm - strawberries and 3/4 cup lowfat milk
6-7:00 pm - baked chicken and salad
8:00 or 9:00 pm I will use the treadmill for 45 minutes walking at 3.8 mph and run for a minute every five minutes at 5.3 mph.

How does a diet close to that look to lose weight? Not enough or too much? I'm looking to start dieting and don't know exactly how to do it. Want to drop from 170 pounds to 140 or 135 pounds. Thank you.

Well losing weight takes time if you want to do it in a healthy way. There's nothing wrong with the menu you've posted if that's for one day; but you are going to get very bored of it, very fast. It's great you have a plan, but I would plan the entire week and have a snack plan too. Also, a backup plan if you don't have the things you intended to eat on a certain day.

Consistency over time, eating healthy and in moderation, plus your exercise will all result in losing weight.

I would start writing down ( a journal ) of everything you eat every day. If you eat something, write it down. This way you can see overtime if you are going off track and where the adjustments need to be made, etc.