Pasa, listen your goal should be decrease FAT% and Increase Lean Muscle (this is FIT and Healthy), not just losing weight!!

Treadmill is good for Cardio/Running (set a Goal, Marathon or Half Marathon and Train for that)!!
Weights are good for strengths training, and I would add 45lbs (or 35 min) Kettlebell in your goodie list!! (search for CAP Kettlebell in Amazon)

So what about the workouts, variation is the key!! Everytime challange yourself, don't make your workouts monotonous!!

Run, Squats(free or with weights (Front,overhead,back),  Kettlebell swing, Pullups, Burpees, over head pushups, 24" jump are few exercise you can incorporate easily with the equipment you have!! ( you can get in touch with me so I can help you set up your routine if you are interested)

for an example: 5 Rounds of ---> Run 400M then15 Pullups,10 Over head Pushups, 20 24" jump , 20 Squats,and 20 KettleBell Swing!! (you can substitute kettlebell with dumbells but best is to get Kettlebell) make sure you work out in HIGH INTENSITY!!

or create your own workout based upon equipment you have!! or practice WOD from www.crossfit.com/

Diet: Protein (Fish/Meat/Chicken/Paneer) make sure you eat atleast once a DAY!! and Recovery drink is must after a WORK OUT!!

About me: I am a Marathoner and Currently training for Triathlon, and have been trained under Crossfit Trainer for 6 month!!