I am new to the commuting thing, but it seems way overcomplicated, and so much stuff?

here is my breakdown

Bike: $80
Helmet: $19
Panniers: $0
Seat Pack: $0
Patch kit + tube: $0 (if i get a flat i will just hop on the bus with the bike)
Clothes : $0 (i already own clothes)
Winter Gloves: $0
Jacket: $0 (do i really need a "special" bike jacket? i already have enough)
Headlights: $0 (i dont ride at night, will need to revisit this in fall)
Blinkies : $0 (see headlights)
Repair/Maintanence: $? (this will depend on how much tires will be for my bike, the rest is just simple wrench work)
Front basket $20 (its to hold my wrench and my lunch)

I only ride 4 miles one way, and any breakdown its a urban city commute so i usually one-three blocks to a bus stop and our buses have racks for bikes, i dont ride in the rain, i wont ride in snow.

I think for me i need to keep it simple adding so much stuff and variables might take the joy out of just hopping on a bike and rolling with a smile. But i can see where others find the fun in the all the gear and can geek out with the variations.