i need to tone up myself... need help?

hannah.. · Yahoo User

i am 20, 167cm(almost 5'6").. i have been keeping a strict check on my diet over the past few months(i eat healthy stuff, no junk).. and have been very successful.. i have lost about 36 pounds.. i weigh 119 lbs.. i know it sounds fine.. but i still have a lot of fat n my thighs, back, tummy.. all the weight ive lost is only cause i have controlled my diet.. i dont have time for work outs because of my hectic schedule. all i can manage is to take out 30 mins in the morning.. i can go for a walk.. i dont have a high stamina.. as in i can cover only about 3.5 km in 30 mins.. pls would walking help?????