You have flooded this forum with the same quesetion.I spend hours at least resaerching my thoughts as these days we have have a very good resource called the internet and it usually starts with Google!!! when I get stuck I then put it to the forum but without flooding it!!
Microchips may or may not scare you but I do think that Logic Gates will be an harder task.Star with PICAXE ( Google picaxe robot) a very simple programme can make a robot walk.