as the title says i would like to know how a 2wd does in snowy conditions, should i need snowchaines to put on it or not?

 

How much snow do you get in Belgium? 2 cm or 20 cm? It sort of makes a difference.
Seriously, with all season radials you're good in most conditions. If it snows a lot you might want to look at putting all-terrain tires on the rear.
If you're really worried, put whatever the European equivalent of a 2 x 4 piece of lumber is across the bed behind the rear wheel wells and stack 30-40 kg of sandbags in the rear of the bed. If you do get stuck, you can open a bag and use the sand for traction

 

last year we had +-15 cm but that was where i live and i was driving my fiat small hatchback. and this year we will make a trip bit further wich will have minimum 20 cm snow. i now have all seasons on it but when it rains its spins easy (tires are from 2002) and when braking the front sometimes slips aswell

 

Do the sand bags, if you have a limited slip diff you should be good. Just remember it still won't stop like when it's dry weather.

If you have an open diff and 1 wheel is spinning just apply the parking brake a few clicks and it will help transfer the power to the other wheel. Just remember to release it when you get going.

Keep a light foot on the gas pedal. All pick-ups are loose in the rear when empty.