Hey Polly!

You'll probably need to get either some adjustable dumbells, or else a few more sets...like 3#'s, 5#'s, 10#'s to start. You can put together a pretty sensible routine using these...start with one set of 10-12 reps until you get a feel for the exercises, and then add a set of each, until you can do 3 sets of 10 reps. Probably not more than 6 to 8 exercises to start. Alot of beginners start off with a full body routine, 2 or 3 times a week.

Do this on alternate days, so you give yourself some recovery time. You can treadmill on the days you're not lifting.

I would strongly urge you to do a little homework, so you can get a better idea of what you should be doing, and how. www.stumptuous.com is an awesome site to get started. Click on the "iron" section, and then "training". Good luck!