Ok, so you tell him to go download something, but provide absolutely no assistance whatsoever past that point... You could give a little more help if you're going to post, because downloading Blender tells him next to nothing about actually creating a truck.
First off, for future reference this should be posted in the help and support section, not introductions.
Secondly, at the bottom of the forum there is the tutorial section. These user created tutorials should be helpful for you. Below are some in particular that should really help you make a custom truck, however the whole section in general should be beneficial.