thanks again for the responses.

i tried again to get the front wheel installed, and with a slight bit of force, i was able to get it on.

even though the wheels/tires were used, they're a vast upgrade over the original wheels and tires.

i'm going to hit up a bike shop nearby for the chain link tool so that i can get the rear wheel working. i'll also get some new brake pads and a new cable. i'm going to reattach the original brakes but with new brake pads.

as for the bmx chainring suggestion - i've been looking for a cheap one, but putting it on looks like it'll be difficult, as the current pedals seem to be on there pretty good. i may need to find someone to help with that one.