Ok, i will try to guide you on what to do.
If you have no experience at all, read a lot of stuff on electronic(there are a lot of stuff on google) and buy very simple components(leds, resistors, 5 v regulators and some logic gates in dip package with a breadboard(the breadboard is very important).
Then buy the microchip pickit2 starter kit or any other microcontroller starter kit( if you have done step one, you will have no problems).
And then you can think again of your robot, but if (as you look) avent made the previous steps, you will have extreme difficulties and might quit electronics,thats what i did for a little while
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I took me 6 lazy months of electronic learning to make the robot, if you learn 1 hour per day you can do it in 2 months .
You can also buy an electronic book,
but you really need to know before you even think of robots(I will tell you, the first robot ideas that i had when i was not knowing about electronic where very strange for now, and would never had worked)
After that you will get to apreciate the joy of debugging...