If you mean real money, then no. You have to buy them in game, with Simoleons (Sim cash.)
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Well im not sure,but i think when you buy things eg. Furniture then you have to pay a tax on them and you also have to pay bills....
Sims have to go potty.
put a moving platform under it
Yes, you do.
Go to Buy Mode and grab the furniture you want to rotate then press the keys to rotate it.