Hello and welcome to FF Ryan! Congrats on your new pet toad; looks like it picked you instead of vice versa
. First of all, please read this care guide: Frog Forum - Toad Basics - Keeping ground-dwelling Toads. A care sheet for Bufo, Anaxyrus, Spea, Scaphiopus, Ollotis, Alytes, Pelobates. That will give you the knowledge to care for it.
Very important is that all water used in the enclosure is dechlorinated (myself use Seachem Prime or ExoTerra Aquatize on tap water). The toads water dish (big enough for it to fit and filled to toads chin level) should be cleaned in hot water and refiled daily.
Best substrate is either EcoEarth or Plantation Soil shredded coco. Mix it with dechlorinated water until slightly damp and clumps in fist without dripping water out. Recommend a depth equal to toad's height so it does not burrow too deep and you can monitor it better. Then add one or two silk plants, a slab of cork or similar to create a hide out, and cover back and two sides of enclosure with aquarium background or any paper you like. Eventually you want to upgrade to a 20L tank; watch Petco $ a gallon sale for a good deal and get a screen top for it too.
Need to use food supplements, more info on that in here: http://www.frogforum.net/food-feeder...schedules.html. If you or close neighbors fertilize, use insecticides, or add similar chemicals to yard; it's not recommended to catch the toads food in there. If so; can get Night Crawlers (not dyed) from Walmart or local bait shop and crickets/dubias from pet shop. Crickets should be gut loaded with carrots, lettuce, and cherios 24-48 hours before feeding toad and sized no larger than distance between toad's eyes. Dubias sized similarly and freshly molted. Your toad can handle full size night crawlers at present size.
You are correct; it's Anaxyrus americanus, an American Eastern Toad. Not sure of sex; but if it calls or develops nuptial pads (rough dark pads on inside area of front "thumbs), it's a male. Recommend not to hibernate toad. Keep it at normal room temp and it will probably slow down metabolism during Winter, eat less, burrow more, etc. Hibernating toads and frogs is dangerous and many perish from it. Toad will be fine without it.
Looks healthy to me; but you can get a fecal analysis done to ensure it has no intestinal parasites and a chytrid test to check it has not been exposed to fungus. If it comes positive to either a vet can prescribe proper medications. Even if your toad is friendly to you; should not handle it without first washing hands in hot water and rinsing with dechlorinated tap. Their skin (specially the belly) is very absorbent and the oils in our hands is bad to them. Hope this helps and good luck!