Nice work. Your render times are probably because of everything is so reflective (shiny), but it could be many thing (computer specs, render settings, etc.). The image is quite bright but that would be somewhat correct with white on almost all surfaces. The spots are due to your lighting subdivisions being set too low. Try turning those up and also make sure under "global settings" that your raytracing secondary bias is set to .001 and not 0. This will also help clear some of that up. Overall nice work it just needs some attention to the lighting.
Scott
Just to add one more tip for anyone stumbling across this later on...I've occasionally had a weird issue where even purge won't take care of a massive file size. It's been awhile but I think it tends to occur when you sometimes when you delete big chunks of a model as I recall.
Anyway, the end-all be-all purge is to turn on all your layers, copy everything and paste into a fresh drawing. This has helped me a couple times in the past.
-Brodie
thanks guys, i've never worked in 3DS, only to export models that i got on the net, so i really don't know how to scale for exemple, but this is a sketchup forum so i will try it myself. if anyone has more information about the broken pieces and some way to solve this, i'd aprecciate.