From where so much of energy would have arrived as was required for such a giant universe to have come into existence? If we convert the mass of all the stars and all the planets which must be weighing trillions and trillions of tonnes by the equation E = m.c^2 it gets converted into an unimaginable amount of energy. Would so much of energy not have gone into the evolution of the Universe? I am at a great suspense whether the Big Bang theory or any other theory at all answers from where so much of energy would have come that would have got converted into so many trillions and trillions of tonnes of the mass of all the galaxies put together. How we can believe in the big-bang-theory unless we know from where so much of energy would have arrived?
I think it'd be helpful to explain what you mean by "have gone into the evolution of the Universe". Also, please stay assured that a lot of attention is going towards the shortcomings of big bang theory and other cosmological theories already :) 

If by evolution of the universe you mean its expansion and accelerated expansion, then it does not require the energy equivalent of the galaxies. The reason is that it is already happening, without using their energy equivalent. 

Where the energy came from: Probably one of the biggest physics and philosophy open questions, if not the biggest one. So, no answer can be given right now. 

Last but not least, the energy equivalent of the galaxies is currently considered to be only a fraction of the total mass/energy in the universe. The rest being the unknown factor named dark matter and mainly the unknown factor called dark energy. The latter is actually related to the evolution of the universe (after the big bang of course). Its nature not known yet, but it clearly is not in the form of matter, unlike galaxies.