Foreshadowing and metaphor because it foreshadows what will happen next (how they both got attacked by bob)
Answer:
Two-Bit came up from behind and grabbed their shoulders impersonating a Soc. It was scary for Johnny because he thought he was going to get jumped by a Soc again.
Explanation:
personification because it is giving a human action to a inanimate object
Answer:
I have one. "Barbie's Literal Dream House"
Explanation:
You said they turn into dolls so that explains the Barbie part. Also, Barbie is often associated with "Barbie's Dream House" but since it's a sleepover it's literally a dream house. Don't publish a real novel with that title though because you could get sued.