The only advice I can give you is basically the cheap ways to work out. You have access to the internet, there are plenty of websites that will have workouts on them, just do a google search, summat like 'beginners workout.' Use cans of beans instead of dumbells, use your bottom stair as a step, go to poundland and buy a skipping rope-it's fab exercise and quite fun.
Also, I recommend the delight that is you tube. You will no doubt have a celeb or 2 in mind who's bodeis you admire, or know the names of celeb personal trainers or have an idea of the kind of exercise dvd you'd like if you could afford it. Go on you tube and you will find the workouts. It can take you a while to find what you're looking for but the search is worth it.
Hope this helps. x