For a start, walking would be different because when you put your weight on the foot behind you there would be nothing to stop it sliding. You would fall over and not be able to walk. It would be very hard to get around. You could consider blowing yourself around but it still wouldn't work. Taking in a breath, you would slide forward and then blowing out, you would slide backward!
Having no friction when walking could also be a huge advantage. You would be able to push yourself off against a wall and slide huge amounts of distances forever without being slowed down or even stopped by friction. A way to stop would be by just going into a wall!
Buses, cars, trams, trains and bicycles wouldn't work because their wheels rely on friction to move. Magnetic transport would have to be created where vehicles would move towards to a magnet that is attracting it. This could be very costly! Brakes would have to be created but they wouldn't be allowed to rely on friction like all vehicles do today. Without vehicles opertaing on engines the world would be a lot cleaner and a better place for people to live.
Every part on earth that is assembled and kept together with knuts and bolts would fall apart! Can you imagine, building, sky scarpers and famous monuments falling apart because there is no friction to keep their nuts and bolts together!
Without friction it would also be very hard to brush your teeth and this will be an uncomfortable thing for people to live with! It would be very hard to actualy take grip of the toothbrush and once you finally do grip it tight enough so it wont fall out you would barely be able to actually brush your teeth. The toothbrush would just slide across your teeth so fast that you would spray your face with toothpaste! You would then be likely to try wipe the toothpaste off with a towel but it would also slide across your face and...