。
She bought a complete tea set.
Literal
She [topic-は] tea-utensils one-set [object-を] bought.
紅茶 ('black tea') literally means 'crimson tea,' named for the color of the brewed liquid — distinct from 緑茶 ('green tea'). When Japanese says 紅茶, it specifically means Western-style black tea (Earl Grey, English Breakfast, etc.), not the green tea of traditional 茶道. 道具一式 ('a complete set of utensils') uses 一式 ('one set, full kit') as a counter-like quantifier indicating completeness. 道具 ('tools, implements') generalizes from kitchenware to any equipment.