There's a simple way to look at it. The kick remains a kick until it comes into a player's possession or becomes dead; any other touching short of possession leaves it as a kick. If it becomes dead, then that answers all the other questions. If a free kick ends in a player's possession, if it's a player of the kicking team, it's also dead. If it's a player of the receiving team, then since it's no longer a free kick, any later loose ball or change of possession is ruled under the rules for that kind of loose ball or possession change.
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