Castorp wrote:
1) How is teleport handled? Who puts a teleporting formation first? Does one side put all the teleporting formations and then the other? Or do you switch? If you are placing infantry into terrain, do you have to roll for dangerous terrain? 
From the rulebook,
Quote:
SPECIAL RULE
1.4.2 Abilities Used At Start Of Turn/Action
Some   units   have   special   abilities   that   are specified as taking effect at the beginning of the turn. These   effects   are   resolved   before   the Strategy roll. Similarly, abilities that are used at the start of an action can be taken before the Initiative roll is made or the action chosen. If both players have effects for the beginning of the turn,   take   turns   resolving   them,   alternating between players for each subsequent effect until all   effects   are   resolved.   The   player   with   the higher strategy rating decides which player will go first.
regarding terrain, relevant part of the rule
Quote:
2.1.17 Teleport 
 If placed in dangerous terrain then a dangerous terrain test must be taken when the unit is placed on the table.
So only if the terrain is normally dangerous to the unit would you take a test. The only terrain listed in the rulebook that is dangerous to infantry is, as stated earlier, Marshes (dangerous to AV's and WE's too) and Rivers (Impassable to AV's so no teleporting into rivers for them and has no effect on WE's).