I don't get this I need help

1. Comma between “car” , “opened”
2. Comma between “soup” , “salad”
3. Comma between “go” , “when”
4. Comma between “bandages” , “liniment”
5. Comma between “foot” , “rubbed”
6. Comma between “juice” , “cereal”
7. Comma between “afternoon” , “we”
8. Comma between “downtown” , “will”
9. Comma between “public” , “the”
10. Comma between “meadow” , “through”
11. Commas between “long” , “dark” and “grim” , “ruined”
12. Comma between “gigantic” , “stupendous”
13. Comma between “seventh-grade” , “eight-grade”
14. Commas between “enormous” , “white” , “drifting”

I think you can put commas before every “and” too but it is not necessary

Atahualpaemperor of the inca empire who rose to the throne after winning a civil war between him and his brother.  -he refused to become a spanish vassal or christian.-francisco pizarro kidnapped him and demanded a huge ransom.  -pizarro's secretary described him as "a man of thirty years, good-looking and poised, somewhat stout, with a wide, handsome, and ferocious face, and the eyes flaming with blood."-after the ransom was paid, atahualpa was killed by pizarro

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