Hi amanda,
foremost i'd like you to know that I am a personal trainer and also a nutrition, health, and wellness specialist. If you need photos to confirm I know what i'm talking about, just ask.
There are a few things you must understand.
1 - as a woman, your fat naturally stores in your thighs / ass. This is to balance your centre of gravity and breasts. Guys naturally have their fat reserve in their stomach with a more negative centre of gravity.
2 - if you lose overall weight / fat, your legs will show this the most and will see results the quickest.
3 - you will need to consume less calories than you expend in a day. Change your diet. This does not mean to eat like a rabbit.. Only greens. Just eat less portions per meal, more meals throughout the day.
4 - cardio should be done on an empty stomach in the morning. Don't push yourself too-too hard... Moderate exercise.. (use that bike you've got)
5 - no meals 2 hours prior to bed time.
6 - if you find these small meals does not fill you, then drink a glass of water before every meal.
7 - supplements can help, only if you do thorough research and utilize them properly... You will be able to shed weight safely and quickly. If you are not going to research and understand everything thoroughly then do not try these supplements out. They are: ephedrine, clenbuterol, synthroid/cytomel, and caffeine.
Those are the basic rules of thumb. Follow that and your thighs will reflect this... Once you've dropped a solid 15-20lb or so then we can focus on using that bowflex to firm, tighten and develop those fitness toned legs that all ladies want.