All camera try to target a specific target (audience). The difference is mostly build quality, size, image quality and features. In the table they've marked every camera without AF in yellow. These yo should not buy. Since bulb is such an cheap feature, I would be surprised if you find any (relative new) DSLR without it; since even D3000 have it, you know that the successors will have it, like D3100, D3200, D5100, D90 etc.
Since you are a beginner, you will probably not buy nor need a Full Frame camera. To make it simple, you can use about all Nikon lenses on all cameras, but you should avoid DX (crop) lenses on FX (fullframe) cameras, and vice versa (FX lenses on DX bodies). But that is generally not a problem. You will not lack in quality with a new DSLR. They are that good. Therefore, try how the camera fits in your hand, that for a beginner is really important.
Nikons you could buy: D800, D7000, D300s, D90
So In conclusion:
1) Should not be a problem. There is superb lenses for any segment. Nikon and Canon have their own, but also Sigma and Tokina have produced excelent lenses with outstanding quality versus price. Check at least 2 different reviews on the lenses at youtube before buying any.
2) Bulb: Everyone, AF: Check non-yellow marked lenses on the first link
3) Most DSLR have one or two dials for changing the settings. Generally, the more expensive, the more options you will have. Also it's way easier to shot manual with a advanced DSLR than most of the small point and shot.
If your budget is limited to a D3200 (as in the title), and you still need AF such, I believe you are bound to pick up a higher model at second hand. That is always risky (insurance, lifetime, old battery, scams etc), but some times there are no choice. If you are not willing to wait and save more money that is.