You can find some videos on youtube, or google 'dumbbell workouts' and you'll find a ton of hits. The main thing really is how much you are willing to spend. A good set of adjustable dumbbells up to 45 lbs can cost $300, but if you're serious about it, it's what you will need eventually (and go for some that you can adjust by 2.5 lbs, I didn't and regret it).
I do something like this for the exercises, just with 2-3 sets of 10/12 usually (I lift heavy though so I often reach failure before that), and I just do several of each type every other day, alternating exercises in between sets because I don't like standing there doing nothing for a minute.
http://www.bodybuilding.com/fun/wotw3.htm
Of course a cheaper way is just to use the machines at the gym and do 3 sets of 12 with each of them (well, at least the main ones)
But I love doing it at home too, even if I'm pretty lazy overall.
Either way, start with low weights, and you'll see you'll be able to lift heavier in no time... When it gets too easy to do 12 reps with one weight, I go up 5 lbs.
ETA: if you don't want to spend that much, you can look into resistance bands, they work pretty well too, it's just slower because you can only use one at a time, and you'll have to google the exercises to see exactly how to use them.