It's a touring bike with cantilever brakes and friction shifting? So, you want to overhaul the bike, such as disassemble down to the bare frame and re-build with fresh bearings and grease, cables, tires, brake pads, etc.?

Bearing surfaces: bottom bracket spanner for lockring, crank puller, 13/14 and 15/16 mm cone wrenches. 16/17mm combination wrenches for the axle locknuts. Smaller spanner for headset lockring, perhaps a large adjustable wrench. A stash of bearings to match what you remove. A tub of marine grease.

Cabling: Sharp nippers for cutting cable, not diagonal pliers or linesman pliers, but a good set of end clippers. For housing, Pedro's and Shimano both make cutting pliers, but I don't like them. I prefer a rotary tool with a cut-off wheel. Clean cuts and it can also smooth out any burrs. Needle nose pliers for tension.

Drivetrain: Really, only the freewheel tool to match yours, 12-inch steel rule. Chain breaker.

General: A good set o metric hex wrenches as well as a set of metric combination wrenches (8-mm up to 17mm). Decent machine oil for general lube. Better chain oil for the chain specifically. Finish restorer/wax to rub into the frame after washing it. Touch up paint (fingernail polish)?

Wheels: Spoke wrench that fits your particular size. Good ammonia based cleaner for rims. Pedros tire levers. Decent floor pump with a reasonable gauge. Spare tube. Patch kit.