The main exercises for those regions are : Cycling, jogging (my exp says its better then treadmills if u've no other complications), climbing stairs and my personal favourite swimming (partly because u can focus on specific areas like inner thighs, butt etc and because it works as light strength training too).
You can choose any or a combination of them just do regularly for atleast 3 times a week 20+ minutes a day. Spot reduction just by workouts and dieting is ofcourse a myth so u'll lose all the body fat. As for weight training, for thighs i guess most of the exercises require standard gym equipments but i guess if your aim is just reducing fat, the above mentioned exercises will do.