you cannot access the trip generation online "legally"
ITE pays a lot for the data so they keep that stuff on a short leash, but your company should have it (or buy it) if they do traffic engineering.
as far as your other question:
and if you dont got internal counts for intersections but you have info on trips in and trips out how can you solve that.
I dont see what your asking, but you cant really take info from the trip generation manual and analyze an intersection, unless the only traffic coming and going from the intersection is generated by a certain business, and thats generally rare.
The trip generation is mainly used to get an idea of how much traffic a certain business, park, golf course, etc will generate.