How can I extend this circuit to use it in our real life?
The circuit you have shown WILL NOT WORK: -



It shows a transmitter and receiver of power (top and bottom). The transmitter of power has some kind of rectifier THAT WON'T WORK - both diodes are facing the same way - it needs to be a bridge rectifier. Then it shows an oscillator - THIS WON'T WORK - there is no active device to control the oscillation and no connection to ground for the current in the coil to be developed.