newbie can la model this one...use cube...use cylinder...boolean here, boolean there...duplicate some more...

i suggest 3dsmax...go read the first tutorial provided with the software...that should help you get started...

the thing about 3d...it's not just about the software...it needs design and creative thinking process also...no "1-push-button-create-amazing-3d-work" in any software... n___n...so just use any software you find comfortable using...stick with it and keep on learning...

or...just download this http://www.lego.com/eng/create/digitaldesigner/