Blue smoke is usually piston rings that are gone, most people try to remain optimistic and think it's just the stem seals as these are easier to replace..... But yeah you're looking at an engine rebuild for this
Bushes and balljoints will be getting tired at that age and will need to look into replacing
Engine wise the cambelt/tensioner/waterpump should deffinately be done, as well as valve clearances
Check if engine mounts have been replaced, these are a weak point especially the rear mount bolted to the subframe, mine were all shagged after 40k
Check for the clutch slipping on a test drive, bonus if it's already been replaced! My oem clutch was completely worn out after 50k miles
Drivers side r/h bolster tends to go soft from getting in and out the car, replacement recaro foams can be bought cheaply enough though
Check for rust around the rear arches, front panel behind the front bumper and underneath if the car has not been undersealed
Rear lights the seals will go and let water in so check for leaks in the boot
Check that handbrake releases fine as the rear calipers have a tendancy to stick
Crunches in gearbox from worn synchros / MTF not being changed frequently
Inner CVs are a bit weak so check for grumbling on full lock
TBH all of the above are things to look out for on BOTH a DC2 or an EK9, the suspension and drivetrain on both cars are VERY VERY similar and as a result share similar problems
Obviously look out for obvious other things like unever wear ont he tyres, scored discs, service history etc