Cooktop replacement… induction or ceramic?
I agree with the comments saying you should have an electrician do it. As pointed out by @Ecnerwal they will be able to advise before you decide which appliance to buy and help you make an informed decision.
The key factor will be the size of the cable to your existing hob. It depends on the power of the new hob, the distance to the fuse box and whether the cable runs through insulation or not. More powerful hob, greater distance and going through insulation = bigger cable required.
If the existing cable is suitable it would be a quick job for the electrician to fit the new hob. If the cable is too small for the hob then they'll need to run a bigger cable and that will cost more. Depending on the construction of your house might require lifting floors or making holes in walls.
I won't pretend to do the calculations but there are cable calculators online that will help. For the UK it seems that 2.5mm2 might be ok if you're lucky, 6mm2 is often ok, 10mm2 is the future-proof option. Best have an electrician make that call.
Also +1 for induction :-)