Weights. Cardio won't tone you up, it might help to some extent but it won't do as much as weights.
You need to make sure you hit every muscle, squats are the best exercises for toning legs and bum and they are sufficient enough (holding either a dumbell in each hand or a barbell with weights, theres loads of different sites showing the variations) though I tend to do squats, lunges and calf raises all with weights to hit my legs.
Same with arms, you need an exercise at least for the back, triceps, biceps, shoulders etc.
Do 3 sets of each exercise aiming for 8 - 12 reps per set so something like this
3 sets of squats / 8 reps per set 3 sets of calf raises/ 8 reps per set etc etc
Between each rep rest for 30 seconds and one minutes rest before you change to a new exercise.
Always try to start with the largest muscle first as this is where you'll tire out and need the most energy, legs are the strongest so do the legs first!
The trick is to use the heaviest weight you can manage, you should be able to do the first few quite easily and then be really pushing yourself for the last 3 -4 reps when you do weights. That's completely normal. You won't look like Jodie Marsh doing routines like this and if you stick at it you'll be lifing heavy weights but still won't look like her, she exercises a lot more hours than this and has a specific diet to look the way she does, you'll just look lean and toned!
Don't do weights every day, make sure you have a rest day after a day of doing weights!
Weights and simple exercises so squats holding weights, statitc crunches, press ups, dips, plank (high, low, oblique etc). Diet is pretty important, drink loads of water and cut right down/back on processed sugary food.
I'm slim...bmi spot on according to HCA who did pill check a few weeks ago....no health problems etc....I just want to tone up a bit without TOO much effort....so thighs a bit less wibbly/tum a bit sleeker...that kind of thing
Any ideas that won't have me feeling like I've run a marathon in five mins or anything daft like that?