Charm Person can end encounters with one spellcast, or get you past finicky guards.
Color Spray is still wonderfully effective as an AoE crowd-control spell (oftentimes simply removing people from the fight until they're all alone).
Enlarge Person is a good way to make your melee friends love you.
Entangle is good CC, over a large area, but only in certain conditions (namely: having plants in the target area already).
Feather Fall is useless most of the time, but incredibly useful in that one situation you need it. Maybe not great in a scroll though, as you'd only get a chance to draw the scroll if you fell more than... 500'? in a round? I don't remember freefall speed in PF.
Grease is also useful for CC, and more so at range (but I'd still use Color Spray over it, given the option).
Identify is amazing for discovering what loot the DM's dropping on you.
Infernal Healing's pretty good for out-of-combat healing (fast healing 1 for a minute!).
Mage Armor (and, of course, Shield) are good for personal defense, but almost everyone else has armor.
Magic Weapon can be great if your DM springs some incorporeal opponents on you (ghosts!).
Protection from Evil (or Chaos, Law, or Good) prevents mental control, which is astoundingly useful if your DM uses that kind of thing.
Silent Image is just full of versatility (illusions are great, especially because people only get to save if they interact with it, IIRC. Oh, an ogre on the hilltop? Well... seeing something isn't interacting, just observing).
Figured I'd just list off a ton of first-level spells, since you said you were starting at first level anyways.
Oh, right. Scrolls. Uh, probably scratch Charm Person and Color Spray, as well as Grease.
