Starting out, please help!

1:02 am in Getting Started, made from scratch (without a kit), Nutrients, Plants, Projects in Process, pumps, questions by mnativid

Hello! I’ve been wanting to start my own window garden for a while now and I’m finally getting on the ball of starting it. I am just a beginner though and I have some questions. If you can help me, your help would be really appreciated!
1) If I’m growing a salad garden, is it okay to grow lettuce and tomatoes in the same column?
2) I’ve noticed in my regular garden bed that my rabbit’s droppings have a profound effect on the growth of my tomatoe plants. Would there be any way I could include them in my system?
3) Can someone please explain how the pump system works to me? I’m trying, but I don’t really understand how it works.
Thank you in advance for your help!