What are all the must haves that i will have to consider purchasing along with my bike? bike rack? Clothing? Shoes?

who sells the cheapest gear?

The LBS clerk noted that most bikes are sold without kickstands and/or pedals. Do i need a kickstand, if not, how am i resting my bike at home. And what about pedals. I'd imagine, I'd need to get those right away; what should i be looking for in a pedal.