T1Ns go up to 2006, so that 2007 rig is either an early NCV3 with the six or a five-banger.
Were it a T1N, the most important thing you can do is to get the above mentioned aluminum aftermarket turbo resonator. After that, consider a transmission cooler.
As for tools, here are my suggestions:
A high quality jack that can lift the rig a good distance. Almost always, the jack that is included just doesn't get the job done.
A roll of Eternabond as a way to keep thing sealed if the roof gets torn or punctured on a branch. Also useful for temporary repairs for body damage.
A decent lithium-ion battery drill that can use the socket bits.