In that case, you can create new fields. You just want to double check that those fields don't already exist somewhere in your database.
If you want to create them in Marketo, you want to go to admin, and then field management. From field management you select 'New Custom Field' and then select the field type.
You want to also make sure that you name it correctly the first time, as once you create a field it is in there for good (although you can 'hide' it).