Totes_McGee says:
Actually, you have to choose between starting equipment OR a random amount of gold.
Wording from PHB: "When you create your character, you receive equipment based on a combination of your class and background. Alternatively, you can start with a number of gold pieces based on your class and spend them on items from the lists in this chapter."
On the page it lists "Starting Wealth by Class." Fighter is 5d4 x 10 GP, which is where that extra 125 GP came from. But again, you only get this if you chose the gold option, not the equipment option.
The 10 GP on the Beyond sheet is what you should have, I'm pretty certain. Unless you want to start with the gold, instead of the equipment, and then buy each item you need individually...which I don't think you want to do.
Regarding background: sounds good! You can make the backstory as simple or as complex as you like.
Ah got it! Then I'll edit my sheet here to 10 GP! Thanks for informing me!
But yeah, I think I'm going a simple backstory for this, I don't feel the need to go all out, ya know? Sometimes simple can be good. Also the town he came from is called Stoneward.