What you've described there is a fairly standard procedure for an extract kit. (The "thick like molasses" stuff that came with the kit is called liquid malt extract, and this is what provided your brew with the fermentable sugars necessary to let the yeast create beer).
The only exception, I'd say, is that you tossed the extra ounce of hops in at the same time as the yeast. Hops that are used in the fermentor are referred to as "dry hops" (the hops themselves are no different from those used in the boil. This term only refers to the stage in the process at which they are added). Typically, dry hops are added after fermentation is pretty much complete, although certain styles like the Northeast IPA rely on adding them while fermentation is still going on. Since this is what you did, you can expect those hops to add some nice flavor and aroma, but they will also leave compounds that will make your beer look very hazy. Just be aware of that and don't worry if you don't have crystal clear beer at the end.
So, how long do you let it ferment? Well, since you likely don't have a hydrometer to measure the gravity of your beer ("gravity" = amount of sugars in solution, which helps you determine when the beer is finished, as well as the ABV), you will be flying blind on this one. Officially, fermentation is usually complete within a few days to a week. However, you DO NOT want to get impatient and bottle it too early -- that's how you get exploding bottles. The beer won't suffer from a little extra time in the fermentor, as long as you keep it sealed shut until you are ready to bottle. I'd let it sit in there for about 3 weeks to be safe, then bottle (again, this is a conservative time frame, but since you can't measure, better safe than sorry).
When do you add sugar? Well, there are two basic sugar additions. You've already done one during the brewing process by using the malt extract syrup. That isn't just flavoring -- it's your main source of fermentable sugars, without which you really wouldn't have beer. The second sugar addition will happen when you are ready to bottle your beer. You will need to add a measured amount of simple sugar at bottling time (usually corn sugar or table sugar dissolved in boiled water, although sometimes kits give you little pre-made tablets) in order for the beer to carbonate properly in the bottles. The amount of sugar is dependent on the quantity of liquid you actually have at bottling time (this amount is always a bit less than what you started with) and what level of carbonation you want. There are simple calculators online for figuring that out. It will take another couple of weeks in the bottle to have fully carbonated beer (keep it at room temperature; don't put it in the fridge yet or it won't carbonate). Just remember to be cautious. You don't want to go overboard with the sugar and create beer bottle grenades.
All in all, you definitely seem to have succesfully brewed beer. The main thing from here on is to keep your nose out of it while fermentation finishes, then bottle!
EDIT: Just saw the post above, in which you say that it wasn't a "kit." Regardless, the information above applies.