Why is it that i can play the full sims livin large????

i cant play the indicated examples in the back of the case of the city, the back of the case says::: "A new look , with new furniture and architecture in livin' large, you can create a whole range of environments, including rustic turn-of-the century houses, garish Vegas-style lounges, medieval castles and retro/sci-fi homes of future........ and so on. .... why is it that when i play the sims livin large the only thing that change is that , some of the furnitures and some of the dress.... it says that it change the style of the house!!! why is it that it is also like the Sims original??????? the only different with it is some furnitures and some dresses.... please help me , im excited playing with it!!!!!!!!!! thank you very much!!!!!!!!!!!