1, the max size tool, how many in Injector pins, can we add more or less. ?

The max shot size of the machine is 30 grams so you are limited to that. The largest mold I have made for my machine is 12" x 4" x ~1.5" total thickness. The ejector pins are up to the design of each mold itself. The machine has a generic air cylinder that can be built around to make any kind of ejector setup. I ended up doing a lot of modifications to my machine to suit my needs, you would have to do some similar work to set it up for what you need.