I have a family life agreement with the guy I have been cohabiting, which covers property and maintenance if we separate. Now we plan to marry in a civil ceremony in Cyprus. Do we need to make a new agreement?

This depends on the wording of the agreement you made, and whether, for example, it relates to the possibility of marriage. If it does, then, on the face of it, there would be no need to make an additional, property relations agreement. If your original agreement is silent on the subject, then it is preferable to make another agreement, to clarify the situation, especially if your wish anything other than the normal 50:50 principle, that applies to married couples under Israeli law, to apply.