The petrol is a great motor to drive, so smooth, quiet and not short of power. I can get upto 22mpg on a good run and anything below that is acceptable. Tweak the timing and run 98 octane it'll be even nicer.
Can take it further and re map etc but depends what you want from it.
They produce a fair bit of heat so the cooling system needs to be in good condition, you get a warm left leg driving one!
Being a low miler the exhaust if original can rot from the inside due to condensation/water not being steamed off (Mine had done that) make sure both cat converters are fitted, I looked at a couple that only had 1 and the other wasn't in great condition.
Budget for a full service if no record of all the the fluids being changed recently, use genuine filters and spark plugs, the plug leads could be getting brittle too, highly recommend magnecor leads if needs them.
The usual front axle strip is never a bad idea of hasn't been done. I've got Toyota service history untill I bought it and the axle/wheel bearings had never been apart.
Oil leaks from the rear crankshaft seal, low mileage can cause seals to dry out,go hard and leak, it's a big time consuming job and £90 for the seal.
I had issues with sticky calipers and lack of use probably didn't help them.
Usual areas to check for rust in wheel arches etc.