Every single on of them is DIY except the tranny

Look on Ebay and find a used tranny and replace it

Replacing is better then Repairing in my opinion

The headgasket my be a bigger task then you might be able to handle if so take it to the dealer and have them do it...might as well replace the timin belt at the same time, since you have to take it off in the first place.

good luck