Do you know some of the meanings of "get" in English?

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" (and "got in the past) in this example?: 

"What did you *get* your sister for her birthday?” “I *got* her some earrings and a necklace”

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" (and "got" in the past) in this example?: 

“What did you *get* for your birthday?” “I *got* some beautiful jewelry from my brother!”

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" in this example?: 

"What time does it usually *get* dark in São Paulo? "

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" in this example?:

"I didn’t *get* that part of the maths lesson, can you explain it again please?"

"Get" is a more informal alternative to several other verbs. What is the meaning of "got" ("get" in the past) in this example?: 

"How old were you when you *got* your driving licence?"

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" (and "got in the past) in this example?: "What did you *get* your sister for her birthday?” “I *got* her some earrings and a necklace”

"Get" is a more informal alternative to several other verbs. What is the meaning of "get" (and "got in the past) in this example?: "What did you get your sister for her birthday?” “I got her some earrings and a necklace”