Check the recipes section for ideas on healthy stuff you can make - I've posted a couple myself. (Just had the spicy chickpeas with a dollop or two of fat free yogurt and a couple of slices of whole wheat low fat bread - nice lunch).
Since I've had problems getting to the wellness center where I work out, I picked up some dumbbells (5, 15, 20, 30, 40 lbs in pairs) plus two sets of platemates (magnetized plates in pairs of 2.5 and 1.25 pounds), along with a stability ball. All told it came to about $200, but I'm able to do just about my whole strength workout (with the exception of two exercises, the chest flies, which can be replaced by pushups, and the hamstring curls, which are a bit more problematic - used the stability ball but need some way of adding weight). But really, there's no need to go nuts and buy everything all at once either. I think the program I have (see my diary in the women's section - yeah I don't follow directions too well) is pretty basic - 2 sets per exercise, and all major muscle groups covered. You might want to go to a fitness gear store and actually lift some of the weights to get an idea of what you'll need. Cardio of course, is a bit pricey, unless you're able to run in your neighborhood, or something comparable. Regardless though, start VERY SLOWLY, and do sets/reps you can easily handle (to get an idea of how strong you are) before bringing up the weight. Also, a light cardio warmup before you start is helpful, as is a stretching session afterwards. If you're doing a full body workout, 3x a week is sufficient, because you'll need time for the muscles to rebuild themselves. And of course, talk to your doc first before starting an exercise program - he/she may have suggestions that will benefit you as well, or cautions as to what to avoid. Hope this helps.