Your toolbox should be, if you have one, behind the seat, in the little pocket with the keyhole in it.
The Honda shadow does not have a gas gage it has a lite that comes on when you get to the reserve portion of the tank.
According to the shop manual, the fuel capacity is 12 liters (3.18 gal) with a 2.5 liter (.65 gal) reserve.
Use for example NGK DPR8EIX-9 or NGK DPR8EA-9 spark plugs.
Christmas wine, served 700C
700c-1500c
Not really, but it would very much depend on the kid. 700C is adult size wheels, and they fit in adult size frames. If you're of kid age but as tall as some adults then you might be able to use them. Keep in mind that 700C wheels are too big even for some adults.
Well, 700C is a wheel size, also known as 622 mm or 28". But apart from that I can't figure out what the question is.
Yes it should. I've been running 700c tires on my modern 29er wheels without a problem. You could also try looking for 1.5 inch 29er tires.
It's best not to use tire sizes in inches, as there are often several different sizes in the same inch designation. Safest is the ETRTO size in millimeters, where 700C = ETRTO 622 mm. If you insist, 700C will usually be a 28" - but there are at least two sizes starting with 28".
Almost 100% definitely not.
C as in 700C is a leftover from an old french sizing system. Doesn't say much today. Sheldonbrown.com has nice writeup about tire sizing. It's better to stick with the ETRTO marking of diameter (in mm) and width (in mm). A 700C tire will be 622 x 23-38 mm. 23 mm width for a road bike, 38 mm for a hybrid.
Most likely it uses 700c wheels. But there is a small chance it uses 650c.