There are Sims 3 custom worlds, and you can find them on a variety of websites in the internet.
custom content is legal for the sims 3 and any other game,unless it breaks copyright laws
You can find custom content on various third-party websites, or by downloading pre-made Sims with custom content from the Sims 3 Exchange.
Happy Simming! <3 FSC
meez.com sims 3 poptropica
If I understand correctly what you mean, yes
Here are some custom content sites.The Sims 2 ExchangeThe Sims 3 ExchangeModTheSimsThe Sims ResourceGarden of ShadowsSimbologyMore Awesome Than YouInsimenatorLianaSims2AnnaMariaSims2DecorgalThe Sim SupplyxSIMS.de (mature content)There are plenty more sites than this. If you want more just google "sims 3 custom content".
there's this little paint brush...
You can have one, but custom content is required.
you press the clothing
In the Sims 3 base game, there are only two worlds. You can download Riverview from the Sims 3 site, but you must have a account. However with most new Expansion Packs a new world is released which you can play in. With the additional option of the Exchange, where you can get worlds created by other players using Create a World, which you can also download from the Sims 3 website, there are almost infinite worlds for Sims 3, and certainly more than almost every single computer in the world can handle.
I've not seen escalators for TS3. I would try some of the custom content sites and request that one be made. Mod The Sims is a good place to start...they have good creators who are willing to do requests.
This is how to add custom music if you play sims 3 on a pc: Go to: My Computer>(the drive you installed Sims to)>Program Files>Electronic Arts> The Sims 3>GameData>Shared>NonPackaged>CustomMusic and drop files into this folder. They then should play on your sims' stereo, under custom music :)