if the shoes are siezed to the drum, its not going to adjust.
Jack it up, put it on stands, make sure they are good and firm. Shake the car and almost try to knock it off the stands. If it stays up, proceed.
Take off the wheels.
BFH like Mike and Trevor said, with some penetrating oil on the studs where they come out of the drums.
Once you get the drums to move with a large bar between the studs to turn them, keep spinning them for a bit.
now you should be able to adjust them loose. And then take off the drums.
If the wheel cylinders are not leaking, and the pads are still good (at least 3/32) just give the inner part of the drum a good sanding with some 60grit and a light scuff on the shoes too. Next, get a can of brake cleans and a toothbrush. Use the whole can on both sides. Scrub with the brush to get the nasty bits out. If you have a pressure washer, use that, it makes it alot faster and really cleans it up.
Next use some brake lube on the sliding parts of the assembly, say where the side of the shoes touch the backing plate etc. DON"T get any on the friction surfaces. Put it all back togeather and adjust the shoes so that the drum just touches the shoes when spun by hand. You can hear and feel it.
Toss the wheels back on and go have a good drive.
Oh, ps, penetrating oil in the ebrake cable is a good idea too so it doesn't sieze too.