My English is also bad, but in computer I prefer'it.
1.I'm a amatory in 3D.
2.The best documentation I've found:
wikipedia
and
mtl file
3.The Ns and Ni is not so important for the start. You must make many test until You have a acceptable result.
4.I suggest to remove some texture from furniture:
-edge
-material (gren color)
5. Try also modify this:
illum 9
d 0.7
Good luck!