I'm new to this so forgive any ignorance 
Could anyone either answer the following questions or point me toward a link/website that would explain in laymans terms
I have an idea for a series of children's books, age range 5-8yrs. I've written the first one pen and paper job and have themes for another 4 or 5.
Where do I start? I think I've gathered that the best way is to approach an agent, is that right?
They would require illustrations and I can't draw for toffee so how do I approach/solve that?
When submitting, how should it look? In what format? I'm a bit crap with technology at the best of times but could cobble something together on Word 
What if an agent or publisher thinks "Cracking idea, we'll steal that and give it to our more competent, established writer", do I did to "copyright" it in some way?
What do I send to an agent? The whole first book/story and outline for future "episodes"? Or a taster?
Any advice gratefully received 