The first question you have to ask yourself is if you are willing to commit to restoring this truck?
In order to eventually move forward with getting this back on the road reliably, you have to first learn about the truck, the entire truck.
By looking at the two pictures, your father did some extensive suspension modifications to that truck. Rarely that is the only mod done, considering the door handles have been shaved and the battery looks to have been relocated.
So once you decide you want this as a full time project you will likely have to go through each section of the truck and become familiar with the mods and what was removed/added.
If you do not take a meticulous approach to taking apart this truck both in your head and in reality, you'll end up dumping money all over this without resolving any one problem.
10 years without running is no joke, you shouldn't just drop fresh gas and a battery and assume you'll be ripping around town over the weekend.
If you commit to the restoration, we have all the resources you'll need to get ahead quicker than just fumbling around. These are amazing trucks, but when left to time, especially heavily modified, you're going to run into plenty of skeletons.
Start a build thread and keep us posted, that is a handful. Also if at all possible, post more pics, the more info you can share the faster and more accurately we can help get you pointed in the right direction.
As you mentioned, it is a 2.2L, year may be irrelevant. Pick a section of the truck where you want to start and work your way through it. I would try and find a spot where you know it will be protected from the elements and you can safely get under it for mechanical work. That may be sitting for a while .. lol
