Is folic acid, iron is ok to take wen ttc and during pregnancy?

Partial answer: I don't understand the "wen ttc" part of your question, but can say that both Folic Acid and iron are safe during pregnancy. Iron is sometimes recommended if you have severe anemia during pregnancy. Folic acid helps prevent some birth defects, but is best started before pregnancy. An informative iphone app resource on this and other prevention issues is my health checklist 2012.

Preconception: Up to 1mg of Folic Acid before and during pregnancy is fine. Iron can be overdosed and certainly causes constipation. Before taking iron, check to see if you are actually anemic or not and allow your provider to recommend a dose.