CS:S weapons specify every sound effect in their model, except the firing sound. Hence, TTT does not try to play any reload/draw sounds. Adding fields with creative names like SWEP.Reload.Sound has no effect. You will have to play them yourself, eg.
function SWEP:Reload()
self:EmitSound("myreloadsound")
return self.BaseClass.Reload(self)
end
function SWEP:Deploy()
self:EmitSound("mydrawsound")
return self.BaseClass.Deploy(self)
end