There are plenty of humanoid and hexapod robots money can buy these days. If you are into DIY electronics, you can build your own robots. Take Capers II for instance: it is a hexapod robot you can build with an Arduino compatible robot controller (Botboarduino), SSC-32U Servo Controller, a PS2 controller and 18 high-torque analog servos.
You can customize this robot by upgrading the frame and writing your own code. The instructions for the project are available here.