Yes, don't give up on them yet. The one that wilted may lose all those leaves but still grow back, though considerably set back. Keep them out of direct sun at first as imafan said. They are not used to the sun or wind yet. If those are buckets, be sure you made drainage holes.
Miracle Gro POTTING soil is correct but NOT GARDEN SOIL. Garden Soil is meant to be used for in-ground not containers, and particularly not peppers which needs good draining soil/potting mix.
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