Masport 835x I need help with basic parts,starting and running info?

What was I thinking! I was given a Masport 835x 4 stroke mower. I have no information with it. I have always owned 2 Strokes. I am trying to get it running but have discovered it has no markings (re choke, ignition, fuel valve). When my victa 2 stroke of 15 years finally died I thought this was a good idea. I am normally a rational human being! Help!