I would venture to say the ram is fully down if it were in storage.
With any rusted ram, clean the rust off the ram where you can get to it, steel wool and kroil works pretty good, and I've never found anything that busts rust like kroil.
Turn the press up side down, tap on the ram.
Use a wood block/hammer.
Coax it along, don't just hammer it through to full 'Up' and have it stuck there...
When it breaks loose, work the ram, work kroil into the mating surfaces as you work the ram, work longer and longer strokes,
Keep wiping the rust off as it gets dragged out of the press body so it doesn't work as 'Liquid Sand Paper' while you are working the ram back and forth.
Keeping that rust wiped off, and fresh/clean lubricant in there will be a biggie, and it will seriously reduce the wear/slop/damage you do while getting everything working again...