I thought mine were missing too at first, but I just simply overlooked them.
Once you open up a world, you have your icon toolbar at the top of the program.
You should see the tabs, "Roads and Trees", "Lots", and "Terrain". Click on the Terrain Tab.
Under that tab, click on the "Terrain Painting Tools" icon. It is the first of those 4 icons once you click on that tab. (This is where EA hides the sculpting tools.)
Then a window will open on the right side of your screen. You'll see 4 buttons again, "Paint" (which is selected by default), "Sculpt", "Mask" and "Routing". You'll need to click on the sculpt button. And you'll find all the tools you'll need to create mountains and valleys.
I hope this helps!