@NickH
Good old day using the amiga 1200 and LW and doing Babylon space scenes
i do have all 3d programs, well I do also Have an old LW 9 version but I have gone on to blender as it is free and has a good community for support, Eg blender guru.com
As with 3D max 2012 i just can't relate to the features/concepts of the menues/buttons and find you have to do a dozen things to creat a simple normal map or bump map, but you do get amazing results from using it tho. A nice person in the forum called Pirate mike is verry good to get help for 3d Max, he is a Gem
So for simple things i use Wings 3d or milkshape or even fragmotion
for proper structual buildings i use TurboCad,
And for all round modeling i do prefer Blender.
And again blender for anims, even tho i have Messiah 5
But as mentioened, every one has there own favourate,
But i would start of using a simple one like Wings 3d and get the jist of working in a 3d enviament and then progress to the more advanced ones.
Try not to run before one learns to walk
But saying that Blender has many tutorials that can get you creating in no time at all.
So in all grab a copy of Blender and give it a go
you may not won't to bother about any others, and spend time learner them.
As for creating Terrains, I prefer EarthSculpter
http://www.earthsculptor.com/download.htm
there is a free version, and it is easy to use and create good maps in no time at all.
I'am not GOD but i can make you see again by taking my fingers out of your eyes and i can make you walk again by taking your beer away, but if you take my beer you will not walk again