Definitely

The cheapest way to update is to leave the wood alone. If you can live with it. To change the wood would involve painting or limewashing it. You probably couldn't even just change the doors because all your frames & fixed panels are still wood. Plus usually doors from places like Ikea are not the same sizes as a custom built kitchen

. The wood might just benefit from something like Marveer to spruce it up.
Changing the handles is inexpensive and makes a big difference. Most handles are only $10-15 each. I would suggest you keep to the style of your kitchen so don't put ultra modern handles on country kitchen doors.
The next step would be to change the benchtop. This can really make a difference. Have a look at homes selling in your area to decide if you would benefit financially from putting on a stone benchtop. If you decide on stone let me know because there are issues to consider with doing that.
You could buy new appliances. Do buyers in your suburb expect European appliances? A nice stainless steel hotplate & oven adds wow factor. And a more contemporary sink perhaps.
What do you think? Would this spruce it up enough or should we talk about changing the wood as well?