Hi Damien,
You are one fortunate young man. I’m sure you realise that you have a valuable piece of history in that truck that will appreciate in value if looked after. As Clive says it’s great to hear that you have the enthusiasm to fix it up. You may be best finding somebody locally as a mentor who can pass on their wisdom. A retired mechanic would probably love to help you out. That said, we don’t yet know what is needed.
As a start I would take all the plugs out, disconnect the battery, and try and turn the engine over by hand the correct rotation is important but you’ll soon feel if it’s seized which it probably isn’t. You could put a few squirts of light oil down each plug hole just before doing this (expect white smoke when you first start it). If it turns, you may need to rock it back and forth, put a thimble full of gas down each plug hole and put the plugs back then see if she fires up after checking there’s oil in there. In fact dropping the oil and renewing it plus a new Toyota filter is worth doing anyway. Check the air filter too for any nests or blockages that may have got in during storage. Check the radiator has coolant in it up above the tubes too. Then see if she fires.
If she doesn’t turn over by hand leave the oil in there overnight and try again in the morning.
Use your eyes to look for anything that may be wrong, like water in the oil. You can also turn it on the starter with the plugs out to clear out the cylinders before putting gas in and the plugs (not too tight, just tight). Tread carefully.
Good luck with it, I’m green with envy and very much hoping you’ll keep us posted with lots of pics on how you get on.
Best wishes
Rich