Magrijade, Just do exercise for 45mins each day if you can, enough so that you feel hot and sweaty but are not stuggling talking to someone if you had to. If you have no exercise equipment you could do one of these.
1. WII Fit if have a machine (good fun)
2. Steps on the stair (up left foot/right foot, down left foot right foot) briskly.
3. Go for a speed walk or jog. (just need trainers and loose clothes.
4. Skipping (use a bit of washing line if can't afford rope).
5. Gym ball is cheap and good. (about £10 Argos)
6. Use your body (press ups on knees if new to them, reverse dips(hands on chair behind you and lower bum up and down, knees flexed, not locked), squat thrusts, star jumps etc.
The thing is any exercise is better than none, try to do at least 30mins, 45 mins is best for fast results.
Get a friend involved who is also trying to lose weight, they will make you feel guilty when you don't want to train and will urge you to go.
Good Luck