Nice to see some Spiders making it over to Canada!
Is the car European spec? If so, it will make it different to the UK cars in terms of alarms and immobilisers - also im guessing the car is a Phase 1 model (MY 96-98?) - this also makes a difference......
Battery connections, earths and the battery itself are all very important on these cars - if any are slightly 'off' they can play havoc with the electrics. Id definitely buy a new battery just to remove any doubt.
Is the car a V6 or I4 (twinny as we call it). If its the I4 it needs special sparkplugs, and they cost a fair bit. Belts are also very important on the twinny, less so on the V6. Unless you have documented proof of a recent change id be putting them high on my to do list.
Other than that treat it as any other car id say - dont run it low on oil, may be prime the cylinders with oil if its being sat a very long time, a decent new battery, check tyre condition and hopefully off you go.
Take some pics!
-1998 916 Spider 2.0TS Lusso-
H&S Corse stage 1.
CATCAMs stage 1 cams with Savali custom ECU remap.
305mm discs with 166 4-pot callipers.
Ragazzon exhaust mid section.
Biscione Racing 2x70mm rear section.
17" Zender Siena wheels with 3mm rear spacers.
etc etc etc!