I started building my Christmas Present the other day. It’s the LEGO Technic 42029 and it looks like this when it’s finished
It’s available from Amazon and many other retail outlets and is brilliant.
Now build the cab
Add the hood(bonnet)
And join the bonnet to the Chassis
So onto the power functions. You start with LEGO 8293 for this.
Note batteries not included and it takes SIX AA 1.5V!!
This kit includes the Battery Box, switch, Motor and lights. The instructions for the adding the Power Functions are included with LEGO Technic 42029 and although it’s very clear how to install the parts you need nimble fingers.