Tobys base damage at level 1 with a fully charged shot is 203 damage. If he takes Me 'n my magnets (level 1 helix choice) he does +25% damage when shooting through his shield. If he makes a headshot that’s another x1.5 damage. And he can also take a white glove for 0 cost to get 9.8% attack power. Which would do about 418 damage per hit. If you got marked by Ambra, Reyna, etc. that’s another 16% bringing him up to 485 damage, which breaks 1400 damage in 3 hits and it’s all doable at level 1.
That doesn’t even factor equipment that might also have attack power secondaries, a damage booster such as from Reyna, multiple damage amplifiers, a legendary which might have more than 9.8% attack power, crit boosting items, the damage increase as you level up etc.