timber kitchen benchtops need refinishing - who does this?

Hi all
Our timber kitchen benchtops need some work. They have a poly finish which has bubbled and worn away in places. The benchtop encompasses a sink and also the cooktop (gas) which is set in a recess by itself. Meant to replicate the look of a old fashioned fire cooker I think. There is also a timber bar area which needs help too (see attachments).
Hubby is not handy and I think this job is a bit too hard for me. I would really appreciate some advice on how this work needs to be carried out and what tradesman(men) to call to do it.
Do I need to get someone out to remove sink and cooktop first? Do the benchtops need to be taken off? Is this a separate person to contact? How much does it all cost for anyone in the know? I am totally clueless.
Thanks

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