interfacing

i need to interface four dc motors, rf transmitter, ultrasonic module to an arduino board... please help me with suggestions of how exactly i can interface them and which board is best for the same...would arduino uno do?

i need to interface four dc motors, rf transmitter, ultrasonic module to an arduino board

Interface is an imprecise phrase. You should use more exact terminology.

What do you want to do with the 4 motors? Individual control of speed and direction or just toggle all 4 on, full speed, or off.

Which ultrasonic sensor?

What is the RF Transmitter for? Most robots need an RF receiver.

@ Pauls
yes i need to rotate four dc motors just control the direction,
and the ultrasound sensor is for detecting obstacles, its a GH-311RT module, and i am using the rf module to send and receive four signals using two seperately placed microcontrollers