You cannot use a resource pack without an assets folder. The correct folder structure is "[MC-Directory]\resourcepacks\[YourPack]\assets\minecraft\[The textures in sub folders]". I also don't know if it necessarily needs the pack.mcmeta file but I think that could be a problem too.
The texture pack you want to use seems to be for a very old version of Minecraft (I think 1.1).
I can only recommend that you try finding a newer version of the texture pack and/or play an older version of Minecraft.
I hope this is helpful.
VCT
