Tell your shop that your car is nearly identical to a 97 MAxima as far as mechanicals are concerned (not a bad thing).
A chilton or Haynes for that car will work for suspension+engine and such.
1) Yes. No need at all for the dealer on this one.Use NGK plugs only.2)Yes all can be done local.3) Yes your shocks can eb going otu at 100k+ miles, actually most cars shocks are done at 40k miles, its just PPL dont notice it then.
As for tires if you will see snow, I strongly recommend to buy performance tires for summer and change over to real winter tires (not 4 season) in winter.
I will let others more familiar with I30 particulars, cover the rest.
Fred...
