It's helpful to know where you are located when you are looking for assistance, but I see from another post you are in St. Louis. Why don't you just check out http://www.bworks.org/. Go there and either have them pop off your cranks (any shop or a friend with a puller could do the same) or rent some stand time at $5/hr. Once the cranks are off the lockring is easily removed with a hammer and screwdriver or large slip-joint pliers and a rag if you don't have a hook spanner. Your adjustable cup just needs a large adjustable wrench.

Once the BB bearing is disassembled you can inspect to see if it needs replacement and also measure the spindle (it's the spindle you are measuring, not the BB). Note that if you replace the BB you will also need to remove the fixed cup. DO NOT buy a fixed cup tool. Either fashion one (Google Sheldon fixed cup) or borrow one at bikeworks. Parktool.com/blog and sheldonbrown.com will tell you all you need to know about replacement compatibility and overhaul procedures, but the co-op would be best, as qualified in-person help trumps everything else.