Q.coleus
Does coleus come back the next year, if planted outside?

No, these plants are annuals. You can bring coleus indoors for overwintering (treating like a houseplant) but many people simply choose to take cuttings and keep them over winter instead to keep them for planting next season. Here is more information: https://www.gardeningknowhow.com/ornamental/foliage/coleus/coleus-plant-care.htm
https://www.gardeningknowhow.com/ornamental/foliage/coleus/overwintering-coleus.htm
https://www.gardeningknowhow.com/ornamental/foliage/coleus/coleus-propagation.htm