I see this as a great opportunity for you to learn about bike mechanics! I mean, what can you mess up?
If you have a set of metric allen wrenches (4,5 and 6 mm should do it), #1 and #2 phillips screwdrivers, flat screwdriver, 8mm-15mm box end wrenches (or a medium crescent wrench), ratchet with 14 and/or 15mm sockets, wire snippers and needlenose pliers, and a cheapie chain tool from the local bike shop or wal-mart, you should be able to get the bike down to the frame, crankset, and fork/headset.

The cranks and BB require some tools that aren't very expensive at your LBS - crank puller and BB tools (cup and cone set).
The headset looks like a 32mm top nut and the knurled section can be removed with vice grips if it is too snagged to remove it by hand. The fork can be removed at that point - be sure to do all of this over a box lid or on a smooth surface so you can catch any errant bearings.

With that amount of oxidation, the seatpost is probably stuck. There are entire threads on the subject, including links to youtube vids.

There should be some youtube vids on how to disassemble a bicycle.

Ziplocs are really handy - as are old cups or bowls - for keeping related parts together as you disassemble the bike. Bikes are pretty simple mechanical devices, comprised of other pretty simple mechanical devices.