why didn't injun joe move, where will huckleberry finn stay while he watches over the tavern, why did tom yell for huck to run for his life, what did muff potters lawyer do after the prosecution was done with each witness?

1) he didn't move because he was sleeping on the floor surrounded by whiskey bottles.

2) Tom yells for them to run for their lives because Injun Joe was in the room he snuck into, although he was asleep.

3) While Huck is watching the tavern in order to catch Injun Joe, he's going to stay (sleep) in Ben Roger's hayloft.

I'm not sure what you mean by "move". Did you mean from the cave or the tavern?

They use the haunted house as a "hideout"

He tells him to run because they were in the haunted room.

A series of witnesses testifies to Potter’s peculiar behavior, and in each case Potter’s lawyer declines to cross-examine. Finally, Potter’s lawyer calls Tom Sawyer as a witness for the defense, much to everyone’s amazement. Tom, deeply frightened, takes the witness stand and tells the court what he saw that night.

4) Potter's lawyer declined to cross examine the witnesses.