I recently started walking and running on the treadmill. I don't really want to lose weight, but I want to get toned and lose just a couple of inches from everywhere - arms, waist, legs. I'm 5'3 and 110lbs. Here's what I've been doing 4 days a week for two weeks..

10min quick walk on the treadmill
50 squats
10min on the treadmill (walk 4mins, run 3-4mins, walk 3mins)
50 crunches
10mins on the treadmill (same as previous ^)
50 lunges
10min quick walk to cool down

(or sometimes I'll stay on the treadmill for 30 mins and walk for say 4 minutes, and run for 2minutes, walk for 7 minutes, jog for 5 minutes, ect.)

That takes about an hour and I plan to work some light weights into my routine for my arms once I find my weights (they're in a closet in the house somewhere). Also, while I'm not on a diet, I pretty much stay away from breads, cereals and sodas because they upset my stomach. What I do eat regularly is meats, vegetables, fruits and desserts (I don't go overboard tho..obviously not at 110lbs.) I also drink a lot of water.

My question is, is my exercise routine good enough to tone up relatively quickly? When can I expect visible results? Also, I get really tired after running for only a few minutes, any tips on how to exercise to increase my endurance?

You are definitely gonna burn some calories with that workout plan. The first month is tough for working out because you are always sore, or at least I am, but you don't see immediate results. Give it a month and you'll start seeing results.

As for endurance, the only way to build that up is to do some lengthy exercises, preferably 90 minutes or more. You need to build up the number of mitochondria and capillaries in your body and that takes lengthy exercise sessions.

Thanks for the reply. What exactly do you mean by lengthy exercise? Just walking/running or weights and stretches too?

Lengthy means at least 60 minutes, preferably 90+ minutes.

I'll rephrase the question: What kind of lengthy exercise? ..or does it not matter what kind?