If you have no record of the following being done, it's best you do everything for peace of mind
Brake fluid (should be done every 2 years)
Coolant (new G12++ coolant is rated "for life" but it's best to stick with G12 or G12+ and change it every 2-3 years to flush out deposits)
Spark plugs every 2 years, can go for 4 if you use iridium ones
AUX belt every 2 years (it also drives the water pump not just alternator and AC so you don't want it to snap!)
The rubber brake lines are also a good idea if they've never been changed.
Always use best quality oil and oil filter (i use Man W67 filter and Mobil 1 New Life 0w40, my 1.3 has 260.000kms and does not use oil between services, opinions are divided on viscosity but I've found this works great for me). Air filters are cheap, and so is the cabin polen filter (even with activated charcoal)
If you do the service yourself then it comes in cheap even when buying premium parts.