Here is a tutorial on how to model a banana for begginers
Modeling a Banana - Maya Still Life pt 02 on Vimeo (http://vimeo.com/15278818)
to be honest I wouldn't really follow this tutorial because...

And the platform holding his house should look a bit more like a hill a think, because it doesnt look natural, make it sharper too.

thats awesome, have you made any animations with him? I read through the whole thread today. I like your clothes, ive tried making clothes in maya and in other programs but i cant make any realistic...