I'mnot an expert i'm just going through the recruitment process and training myself.
Do you have your own weight lifting bench? (if not you can get a half decent one cheap as chips.)
If so i would use the basic movements only, this will really help you develop strength. For each exercise do one or two "light" sets as a warm up then a set of 15 reps to get yourself going then 2 sets of 6-8reps.
These are the basic ovements:
1. Squats
2. Standing military press
3. Barbell bent-over row
4. Bench press
5. Barbell curls
6. dead lift.
If you are usure what some of the above are please visit
www.netfit.co.uk
I would only do this twice a week. on the other days just concentrate on running, push ups, sit ups and chins.
If you dont have a weight lifting bench at home the website in the link above has a section on circuit training.
I hope this helps you.