"Which of the benelli tnt 899 or 1130 is better Everyday"
I'd say the 1130 - Always go for more power!
"solved is an tnt 1130 failures?"
Most of them are, yes - The ECU map isn't very good and many owners get it tuned
"tnt one should have to saddle bags?"
Maybe - I don't use mine for touring
"the evos cahsis of 1130 silver or gray sport chassis is black or red?"
If you look at the Benelli.sa site:
you can see the colours for yourself
"common faults in the 2 models?"
Not too many if you buy a new bike. Older bikes had some problems - Search on this site for "mods" or "faults". Many owners remove the Airbox flaps and fit a DNA air filter + wire the exhaust valve open. Then get the ECU "tuned" and it should be pretty good
Hope this helps