If you want your roof blacked out, you can choose between gloss effect, 3D Carbon Fibre effect or matte black effect vinyls. I would not recommend the matt black because although it looks very cool it can lose its finish very rapidly if not thoroughly looked after.
As singh890 suggests, the stereo is always something you can do if you really find it necessary. But component speakers can be a bit precarious in the back of the vehicle, best stick to coaxials there and have components in the front.
If you are satisfied with your current audio system though, a bass tube will probably be unnecessary.
Stripes and fake scoops on a verna? No offense to anyone but the verna is quite an elegant car, no need to spoil it with chintzy decor! Also a spoiler is just a waste of money with a front-wheel drive car, can also compromise high-speed stability noticeably.
If your parking sensors have a distance readout a rear-view camera would only be more confusing.
HID kit is a pretty good idea. If you choose a decent colour temperature (~4300K) and align them properly they not only look great but increase visibility at night significantly! DRL's are a very personal thing, I would recommend a DRL kit which is integrated into the headlamps or foglamps rather than just held on with tape.
Do NOT smoke your lamps. A massive risk to road safety, even a light tint can be quite a road hazard! Smoking your lamps never ends well.