nepharim +1
Emuna Peshuta is definitely NOT enough.
A great resource for this is Rabbi Dovid Sapirman – Ani Maamin Foundation [google AniMaamin or Dovid Sapirman]. His lectures [24 in all] are available in both mp3 and CDs.
Besides proving that Hashem exists, runs the world [debunks evolution], he proves that Hashem gave both the written and Oral Torah.
He also has a little booklet on Emuna [published by Torah Umesora]
Great reading and necessary listening.
Highly recommended.