You need an Emitter and a IR Decoder
You will need two Micro controllers one to use as TX and the other one as RX the on that will be on the Actual Robot. The first Microchip you'll have whatever the inputs are and you will need an output for the Emitter, and by the way you will need Programming Experience, Best way to start is PIC BASIC or Micro Code Studio, Google it.
Input 1------' Pic 16F84A '----------(Output)Emitter
Input 2------'
Input 3------'
that's for the TX and you will have to learn how to program microchip just Google everything.
The RX
input
---IR Decoder--'Pic 16F84A '-----output
you can have more than one Output
I hope these information were helpful...