Before you do anything else, I would recommend a Chilton's or Haynes manual to help. And search this site for pictures (I'm not going to make a super long post here) of various parts so you have an idea what you're looking for.
Aside from gaskets, the tools you will need are:
Ratchet and extension
Torque wrench or meter capable of hitting at least 50 pounds.
8mm socket
10mm crescent/box end wrench and socket
12mm cresent/box end wrench and socket
14mm socket
17mm socket
Pliers
Flathead screwdriver
Gasket scraper/poker/set/etc
600+ grit sandpaper
Wire brush
Brake fluid or similar (to help remove gasket crap)
Oil/catch pan
Hammer and piece of wood (dowel is good)
RTV silicone capable of holding a seal for motor oil
Marine grease or vasoline
Paint pen or white out (optional)
Flashlight (optional)
Tray/box for holding tools, and loose nuts and bolts (optional, but really really recommended)
I assume I forgot at least one tool--seems to always be the case in real life, so I will assume it is here, too.
Gaskets you will need (at a minimum):
Head gaskets
Intake manifold
Exhaust Manifold
Valve cover and rubber bolt 'washers'
You can do like I did on my first attempt. Take it all apart, clean everything, put it back together. I...learned a few things that way. Much easier to just ask (as you did here), search the forum (button up near the top-right), and loosely follow the Chilton's or Haynes manual. I say loosely as they sometimes skip steps you need, or add unnecessary ones. DO follow the torquing steps and charts, though.
I'm not going to walk you through it--if you really get stuck, post a specific question here, that's the easiest way to go through it. I will write out a basic rundown, though:
Remove the battery. You will need the space as well as the distinct lack of electric shockingness.
Remove the spare tire.
Drain the oil and coolant. There is a coolant drain plug on the bottom of each head, some are not drilled into the water jacket, so don't worry if nothing comes out.
Remove the air boot, filter, etc up to the injector/carb.
Undo the exhaust manifold bolts (14mm) and drop the manifold. Let it hang from a string/wire/rest it on a block/etc
Tag and undo all spark plug wires, gas lines, and electrical harness. Tag and undo/move any vacuum lines relating to the intake manifold and/or head.
Undo and move or remove your: alternator, power steering, and a/c stuff.
Remove the timing belt covers, loosen the tensioners, and remove the belts. You may have to pull the crank pulley, radiator, and fans to do this.
Carefully (emphasis on carefully) remove the bolts holding the intake manifold in place. These bolts are a pain to drill and tap if they break off. I've done it.
Remove the valve covers (10mm).
Remove the cam towers (10 or 12mm, I forget).
Following the diagram in your Haynes/Chiltons manual for the head-bolt loosening sequence (17mm). THIS PART IS IMPORTANT. The sequence is the same for both heads.
The piece of wood and hammer are for gently persuading your valve covers, cam towers, and heads to separate. Chances are they will be lightly 'glued' via their gaskets.
Have the heads milled at a machine shop (search this forum for info on this, there are some specific things you will need to tell the shop I don't want to take up room explaining in this post).
Clean all surfaces to the point they are so smooth you can not detect even a slight bump with your fingernail.
Put head gaskets and heads in place and tighten to specification in the sequence directed by the book.
Put the rockers and lifters back in place. Use vaseline or marine grease to hold the rockers in place until the cam tower is installed. It will later dissolve in the motor oil. Use RTV silicone to seal the cam towers and put them in place.
Put new gaskets (rubber) in the valve covers and replace.
Put your intake manifold back on.
Replace and tension the timing belts. Search the forum for how to time the motor. It's not hard, but I won't go into it here.
Replace alternator, power steering, fans, radiator, vacuum lines, wiring harness, gas lines, etc.
Tie up loose ends.
Fill with oil and coolant.
Start.
That's about it. Use the search button a lot, and ask a question if you don't find the answer. Not sure there is a good write up on head gaskets, but the various points are discussed ad naseum and plenty of information will come up in a search. If you have a question with no apparent answer, someone will probably link you to it, or answer it directly.
Pictures are really helpful if you get stuck--take one and post it, circle or highlight the question rather than go round and round with lots of posts trying to explain something.
Good luck!