It is so frustrating trying to take a shower or wash dishes and have little to no water pressure, and don't even think about doing any of this at the same time. This is a rent house and the plumbing is the only thing that my landlady hasn't replaced. What can I do to fix this inexpensively? Oh yeah we also have copper lines.

Pump or city water?

City water and if it matters we are less than a mile from the water tower

City water, complain to the city watyer dept. ask them to confirm the pressure reaching the home before you start doing anything. If the city pressure is good you must get your landlords permission before attempting any repairs. You could in the meantime check the outside spigots for pressure and check the main shut off, turn counterclockwise all of the way. Speedball will be here tomorrow morning while I'm still in bed.