Please explain. Provide a logical step-by-step explanation how animals went from say one kind to the many different kind
In most of my replies I'm assuming a certain amount of basic knowledge about TOE. You really need to read some textbooks if you want that kind of detail.
Why should existence of only one type (carnivore or herbivore) support the creationist view but existence of the different types support the evolutionist view?
TOE predicts that, in the fullness of time, all available possibilities and niches will be explored. If you look at the world you find creatures not just in lush, easy environments but also the most extreme cold, hot, wet, dry, deep or shallow places. Absolutely everywhere possible. Many people make the mistake of thinking that evolution is on a course to 'higher' organisms (ultimately man). It isn't. It's simply filling all spaces available, whether that works with complex or simple creatures.
Why should existence of only one type (carnivore or herbivore) support the creationist view but existence of the different types support the evolutionist view
Firstly, it's believed land creatives evolved from sea creatures. In the sea, many creatures eat each other as well as minerals etc. But to answer your question specifically:
There could never be all carnivores and no herbivores because there is no energy input into the system, if all creatures are eating only other creatures. So this situation is impossible (except by continuous miracle).
You could have herbivores and no carnivores. Then the question would be, why have creatures failed to occupy the rich environmental niche of being a carnivore? We would need to discover some practical obstacle that's preventing it - but there isn't one. So if there were no carnivores, this would be a great challenge for TOE.
In a Creationist world, such limitations are meaningless. Any type of creature can exist, at any time, at any place. There is no need to 'wait' for certain charcteristics to be evolved, we can have humans from the start for instance.
In fact you might think that a 'moral' creationist world would deliberately avoid the apparent cruelty of one creature eating another. (In fact this specific issue greatly troubled Darwin himself:
"I cannot persuade myself that a beneficent & omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice. -- Letter to Asa Gray, 22 May 1860.)
So explain what sort of conditions should exist to create all the different types of creatures and such a balanced ecological system.
Different conditions favour different species but the most important limiting factor is that each stage of evolution must work with the material of what has already evolved (ie you can't walk on legs until you have already evolved bones, etc, etc).
You can see a general timeline here:
http://en.wikipedia.org/wiki/Timeline_of_human_evolution
Also an interesting article here:
http://news.nationalgeographic.co.uk/news/2010/05/100513-science-evolution-darwin-single-ancestor/