Answer 1

Language probably doesn't matter too much but C and Python seem common.

Answer 2

If he/she/it is smart enough you can program him/her/it just by talking to him/her/it in your native language.

Answer 3

First thing,
1) You need to be good at electronics
2) You need to know how to code
3) (Related to first)you should be able to build your own electrical circuits

If you can tick all the above things
Then get started with Arduino / raspberry pi
Learn Arduino c / python
That's it, read their manuals if necessary

Answer 4

Your robot virtual or real?

Answer 5

what is the name of the chip that will control it? or haven't you figured it out yet?

Answer 6

I know only arduino or stm32 chip for robot. Maybe Raspberry Pi

Answer 7

It depends on which board you are using.