1) On the panda chips, there is an objective switch card. Can I switch an objective of a different type? (from Panda to Farmer?)
Objective changing : The player can immediatelyYes, you can change it to any type.
put back one Objective card from their hand under the
respective deck and replace it with the first Objective
card from the deck of their choice.
2) On the topic of Baby Making... Is this applicable only on the Expansion pack tiles or every tile?Any plot tile.
The rules don't restrict this in any way (other then Mr and Miss need be on the same plot after Miss' movement.)