"She was a large woman with a large purse that had everything in it but hammer and nails."
"She was a large woman with a large purse that had everything in it but hammer and nails. It had along strap, and she carried it slung across her shoulder."
Their colloquial diction implied that they are black.
Her purse didn't have everything but hammer and nails in it. The hyperbole is used for exaggeration.
The blue sued shoes represent prosperity and indulgence. People like Roger can't afford luxury items on their own. The shoes represent those luxury items.
Blue Suede Shoes
"Roger looked at the door—looked at the woman—looked at the door—and went to the sink." The door was open so you would expect Roger to run out, but he goes to the sink instead.
"She heated some lima beans and ham she had in the icebox, made the cocoa, and set the table. The woman did not ask the boy anything about where he lived, or his folks, or anything else that would embarrass him."