Well, before you can tone you really need size, otherwise what is there to tone?
I would start with sets of 6 reps (4 or 5 sets per exercise, 2 or 3 muscle groups per workout). Gradually increase the weight as you feel able to. After 2 or 3 months you should see good gains in strength. Then you could switch to 10/12 rep sets (reduce sets to 3 or 4) for a few weeks to do a bit of toning, then switch back again and keep alternating. This way you get pure strength gains, plus some toning/size work. It does take time though, you just gotta keep focused.
