So the tools you will need to do this are as follows:
1. Sponge brushes
2. Some sort of water sealant, such as Mod Podge but you can use which ever one you have
3. A black sharpie, and thin paint brush
4. Acrylic paint or fabric paint, I used acrylic
I used the mustard and white color in my paint kit
5. Painters tape
So, to actually list my steps I first started with using the painters tape and taped around the bottom rim of shoe and covered the toms label on the back and the flap label on the sides. 

Before Toms
First step: Cover bottom and labels with painters tape
Second step: I mixed my preferred choice of paints in a disposable plate and started to apply the color onto my shoes with the foam paint brush
I did a total of 2 coats of paints and this is what it looked like after I was done
Third step: I filled in my little triangle on the top of the shoe with a white color paint with the smaller paintbrush and removed the painters tape
Fourth Step: So now its the fun part, I took my sharpie and just started doodling designs onto my dry painted toms I suggest pulling up pictures of patterns you like. I only drew on the top half of my toms not the sides or front toe part. The picture I was inspired by is below:
Fifth Step: After you are done drawing just paint on the sealant all over the shoe and let it dry for a few hours.
After that you're done! Here is the final product:
Lots of love~Saria