Depends on how powerful you want it to be.
Basically thrust has to be powerful enough to get the plane to take-off speed, or it'll stay on the ground. And then you'll want a bit more than that to get a decent climbing rate out of it.
Exactly how much it'll need in numbers is impossible to say, as it'll depend on the aircraft. A bigger aircraft will need more than a smaller aircraft. If you want high climbing rates you'll need more than if you're OK with low climbing rates.
The amount of thrust depends on the power of the engine
An aircraft needs an engine to get thrust and roll forward to gain lift.
The thrust is an airplane is provided by the engines.
Thrust drives an aircraft forward.
The engine creates thrust.
The engine causes thrust, it moves the aircraft.
power
An engine is the usual source of thrust in an aircraft.
You need to be more specific with your question, like which specific aircraft you mean. For example a big aircraft like a 747 needs a lot more thrust than a leer jet just to get off the ground.
"Thrust" is a force, referenced to the direction in which the aircraft is pointing. Take all the forces that act on the airplane. For each one, find the magnitude of its component in the direction in which the airplane's nose points. Their sum is the "thrust" at that moment.
Thrust is the forward motion of the airplane provided by the engines. Lift is the upward force on an airplanes wing.
Thrust is the force that provides an airplane its speed. Thrust must be brought to a certain level and maintained in order for the plane to move at a speed that is sufficient to create lift from the wings.