You will appreciate having your own test kits. It will make life more convenient for you. I know that it goes with out saying but keep them up from your little one as the reagents could be poisonous.
If I had a toddler and an aquarium I would consider adding a lock to the stand where I stored my test kits, additives and foods or keeping them on a high shelf. I have read many accounts of tanks getting wiped out from a child dumping in a whole can of food or additives. I would also recommend not storing a cleaning magnet in the tank. One of my friends has scratches on his 125 from his 6 year old deciding to use the Mag Float.
I would use the rock that you have. It should be full of good bacteria and if you start over you will loose all of that. You could add some rock that is more colorful and it will help color up the rock that you already have. The Coralife is a CF fixture and should grow
coralline with no problem.
