If our company develop a new game that support iOS and Android game using unity3d,
then I need to have Basic License x 1 + Unity License x 1 ?

The pricing document is not entirely clear on this issue, so we are going to update it.

The Unity license includes all supported platforms, which in version 1.0 will be: Windows, Mac OS X, iOS and Android. It will have to be purchased per Unity3D Pro seat as is the official asset store policy.

So you will sell it through the Asset Store? That sounds great! Very much looking forward to it