Good job on starting to get fit! I also started to work out to look good, but it's an addiction i tell ya!
Just a few things that I would change if I was you, I wouldn't do squats with triceps because they don't really do much there, set a day aside for legs and do all dem tings, squats, lunges, quad extensions, deads, calf raises and something for the hammies.... also if you really like your leg day throw in some presses. Learn to love leg day :-)
Aside from that, and on a personal preference level, I would do triceps and chest on the same day, since most of the chest exercices require you to use your triceps anyway, it works out quite well together, so a chest and tris day would look like: db bench, db incline, cable flys and weighed dips (20 kg plate or so), then tri pulldown, skull crushers, tri extension and single arm tri extension.
OH and don't work out your abs every workout.... you wouldn't do chest every time you're at the gym, right? why is it any different with abs? All you're doing is overtraining and thus preventing them from adequately recovering and developing..... roughly work them out every three days.
Beyond that, make sure you're eating both a caloric and protein surplus so that you have enough 'fuel' for a) your workouts and b) to grow...... don't try eat 1600 Kcal a day so that you can develop 'lean muscle' it just doesn't work like that - not on a 6 month basis anyways. you should be aiming the 2500 kcal - 3000 kcal if you're really looking to bulk....