It depends on what kind of robot you plan to build ... mainly what function you plan to make this robot realize ... Basically, what you need to build a robot is a motherboard ... several motors (motors, gears) ... power supply ... tires ... and a steering device ... to realize the lifting mechanism.

If you are a junior high school student and such a novice, then I suggest you buy some robot clothes directly from a big company (provided that you are willing to burn money, it will make people feel uncomfortable. T _ T) If you really want to build a robot with parts by yourself, you have fun. You have to know the single chip microcomputer, you have to be able to assemble all kinds of parts, and you have to know the circuit and programming knowledge.

PS: Welcome to chase points ... I have been short of points recently ... Hehe.