yeah reglue the seat and leave the rack.

wd40 and a rag work great to clean, as does simple green with the former a little better for a nice shine.

a poor man's stand is flipping the bike over.

i recommend you get all the tools you need, as you need them. right now you need a multi-tool, cone wrenches, and the appropriate bottom bracket tool/spanner. you need to clean/repack/regrease everything right now before you ride.