newbie with a turbo 2 find.
 

First of all my names gilbert, im from las vegas, i come from a long background of supras, ive had every trim mk4 and 3. I recently stumbled across a non running 87 fc3s, turbo 2, it was from a old lady that her husband passed away, original owner car,has been sitting since 2010, So far i have found a missing fuel pump assembly and a busted ignition lock, both are on order, but i have managed to spray the engine bay with fuel while bypassing the ignition switch, i heard it run for about 10 seconds, my question would be, what precautions should i take before i get her fired up for a longer period of time, keep in mind i have really no experience with rotary's, anything helps. here she is all original minus lowering springs.

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Thats clean, very nice. If there is any old nasty fuel left in the tank drain it out(there is a drain plug on the tank) and change the fuel filter before running the car.
If it were me I would pull the upper intake manifold to access the injectors and send them off for cleaning and flow testing. The last set I sent off the primary injectors flowed what the should, the secondary ones were considerably less(danger to engine less). This also gives you a great opportunity to replace all the old and brittle vacuum lines along with the engine coolant temperature sensor which can cause starting and drivability issues and make sure the oil injector lines and vacuum spider are not broken.. This would also be a great time to replace of eliminate the fuel pulsation dampener which has caused fires for people in the past.
If you decide to go with an upgraded exhaust, or even just a cat delete the chances of boost creep are very high. Series4(s4) turbos(87-88) are prone to this due to a very small single wastegate hole, the Series5(s5) cars(89-91) have two wastegate holes both larger than the S4 and are also fully twin scroll. You have to use whichever series manifold for whichever turbo you were to use.

Do not use a FCD(fuel cut defender), this just tricks the ecu by clamping the map sensor voltage so it doesn't know youre running more than 6-7psi. Running one of these with increased boost can cost you an engine if you do nothing else. If you're on a budget look at digital tuning RTek stage 1. They have various chips depending on which sized injectors you intend to run, and they include the FCD function and lower the secondary injector transition a bit(3500 rpm vs 3800rpm).

Would all that apply to someone who recently purchased a '91 NA?

So got her fired up today, it idles high but the engine runs strong.

How many miles on her?

nice find dude

Nice find!