It's an old steel bike. It's going to weigh more than a new carbon or aluminum road bike. It's not a road bike, and it's not a modern hybrid.
You'll be able to change a few things like the saddle and tires for lighter new ones. Maybe new pedals, bars, new lighter rack, etc. All this will make a difference in weight. You don't want some floppy old huge plastic padded saddle anyway, or old cracked heavy tires.
My new lugged steel Rambouillet road bike weighs 25 pounds without the saddlebag. Yours will likely weigh at least 30. My ramb weighs 30 lbs with a loaded saddlebag and 2 water bottles- which is how I usually ride most days on all the hills and long rides.
Count on 5 lbs being the box and packing materials...hopefully more!