There are at least a dozen official color schemes that I know of but I don't use any of them (I make up my own that are close enough). In the Resources section RobA made a post about a year and a half back, maybe 2, about gradients and there are some links to the gradients/color scheme websites. I got a bunch from there. The symbol fonts I've never found so I would just scan them in from a Rand-McNally roadmap atlas. I never got around to doing it myself but if I ever do then I'll put em up for sure, but don't hold your breath cuz I don't do that style very often. There is a website somewhere out there with the symbols in .ai format for Illustrator but I don't know if they'll work in Inkscape. For mountains the technique is called shaded-relief and the easiest way to simulate the look is with a soft bevel. No idea about the scale thing, sorry.