autocad 3D landscape and human figures template

Hello guys please I need your help. Help me with the answers to the following
question as regards autocad and sketchup.
1. What version of autocad and sketchup can I install on my laptop that can
enable me to import a sketchup file into an autocad drawing window?
2. When I model with autocad (3D), my model appears unreal because it lacks
landscape elements and human figures. Please how or where can I get such
templates to further enhance my autocad 3d models
I would be glad if I get answers to my questions.
Leggybmax@ymail.com