How fast does a typical airplane have to travel for take off?

Generally it depends on the weight of the airplane.

Light airplane like Cessna 172 can take off at about 60mph, heavy airplane like Boeing 747 needs 180mph to get airborne!

* Speeds vary depending on type of aircraft, weight, and enviromental conditions. Takeoff speeds are referred to as "V1" and "V2". V2 is the speed at which the aircraft can safely become airborne. V1 is the "point of no return" during a takeoff. In other words, if an aircraft experiences a problem at a speed below V1, the aircraft may safely abort takeoff. If the speed is above V1, the aircraft will in most circumstances commence with takeoff regardless of a problem.