Answer to question 1-

Bash: we ran away, but we use to live with our mom. our mom was named Thorn and our dad was named Spike.

Archer Pastry: it's a long story. 

(I want to wait to write about why bash and archer ran away in before the crash, I'm not sure yet that's why I don't have an answer.)

Answer to question 2- 

Slamm-oh: parents knew each other, they were friends.

Pow: we just kind of became friends because we hanged out a lot as kids.