Is the treatment of Muslims toward the Taghut in trade and medicine different from their treatment of other disbelievers, and is loving the Taghut absolute disbelief or does it have degrees?

We do not know what is meant by "Taghut," but mere commercial or medical dealings with them are not prohibited, even with the leaders of warring disbelievers. As for loving the Taghut for a worldly or inherent reason, there is a detailed explanation for that, similar to loving other disbelievers.