What do you mean by Retopology?
R= Taking care of your model edges and vertex, doing sharpen shapes in chamfered ones
How do you make quads to tris? By creating diagonal edges in every quads?
R=Quads [Pararell edges and connections] Tris [ Diagonal connections and cuts, removing useless edges]
LP Smoothing? You mean normal smoothing instead of turbosmooth right?
R= Yes, Smooth modifier on LP
Last is LP Support Edges, what is that and how do you create it?
R= LP Smoothing sometimes turn ugly and very dark, adding aditional connects around can smooth them more