Newbie needs input…

First hello together, I am Paul, 17 1/2 and would like to buy me a Suzuki Samurai (G-Kat 70PS) in the next months and restore it from the ground up / modify it. What in detail we want to clarify later… Now the first questions: – what should be taken into account when buying, except rust? – what about the spare parts supply? – does someone else have drawings of the samurai? now to the ideas: my samurai should later: – on 255 / 275′ tyres ( Road profile) on aluminium wheels, what needs to be considered for this?? – higher, how is this best, and what are justified measures for the pure road operation? – Attachments such as, threshold protection pipes, Cow-Catcher, Sidepipes, Winch, Alu / Chrome rims, Other dashboard (Alu Riffelblech, or Stainless Steel) now told me in another forum that when screwing stainless steel and normal steel the normal steel due to any ionization quickly I had to get the whole body galvanized if I could get a good price with my galvanizer, what do you think of it? I hope there aren’t such crazy answers here, how buy you a Golf GTI or something like that, and I didn’t have fun putting the car in new shop condition, the car should be like loading new from the paint and from the condition, but modified!!! I think that’s it for the first time, thank you for the answer, Greeting Paul