Eat a lot more calories than you can burn. Unfortunately, you can't just make your legs fat. You will have to get fat all over.
By eating a lot.
No, it makes them muscular.
Road running is by far the best way to make your legs skinny
No, it decreases leg fat. It might make legs more muscular.
TO make your legs thicker try to build up muscle in your legs running, biking etc. buiding muscle in your legs is better than trying to build up fat
stop eating then you wont have fat legs then you hungry cows!
because they need warmth to survive and fat on their legs keeps their legs warm
Eat McDonald's 3 times per day
No you could just have close legs unless you are fat...
Running everyday will make your leags, specially quadriceps muscles stronger. Depending on your current size, it may make your legs slim, bulky or lean. If you have fat yours will be slim or lean. You are slim, your fat will be bulky. It all actually depends on your gene.
Dynamic exercise (like running), will not cause a change in muscle size. If you do weight training or use weights on your legs when you run, your legs will increase in size. Exercise does cause fat to be burned, so the amount of fat on your legs may decrease.