The floor looks to be a vinyl or laminate floor with a cork backing. It was IMPROPERLY installed. Any floor installed down there must have a vapour barrier. There is no vapour barrier = improperly installed = no warranty.

The insurance company will be able to tell you what type of floor this is and what they will offer as a replacement value. You can then take a payout from them and go shopping for flooring that you want.

Remember to deal with the concrete FLATNESS rating. If the previous owner failed to install the floor properly we can assume they FAILED to pay for subfloor preparation.

And just for fun, please check to see if the wood framing is sitting on something OTHER than concrete (you want to see metal or plastic underneath the framing).

And check with your realtor to find out how long the previous owner is responsible for the home's condition after it was sold. You might be surprised how long they are responsible for FORESEEABLE problems. If they had flooding in the same way, they are responsible for it *IF they did not do enough to prevent it happening again.

Just a few tips for you. Talk to your insurance company. That's where you want to start.