Get a Lenspen to help clean your lens.
Get a blower to help blow dust off areas where the brush can't reach and also for end-of-day cleaning after shooting in a dusty environment.
Get a microfibre.
Get a cleaning kit, not those cheap $9, invest in a branded one, like
Get a filter ... like Hoya HMC Multi-Coated UV(0) Filter 58mm for $26 from K-13 Marketing at Peninsula Plaza.
If you want a hood, a hood from Canon will cost you $29 from Canon's Link at VivoCity. Model is EW60C, it is a shallow one. If you want to get a 3rd party, can be had for anything below $20. However, get only a compatible one, not those flower petal types, cos you will have vignetting problem at the wide (18mm) angle focal range.
EDIT: Last but not least, when you are at those camera shops, ask about Dry Cabinet. Since you sounded paranoid about the fingerprint on the lens, might as well get one of this, cos you don't want to have fungus growing in your lenses and even camera. You can use it to store other important magnetic/electronic devices in it. What size to get? You have to figure it out how many lenses you want to have in the future, and other things u want to store in it.
Hope this helps answer ALL your questions, from past forums as well as this one.
Cheers!