Yoy already received some advice. Let me add my own experience, of someone who has been travelling to Europe, Asia and Australia for 10 weeks in the last 12 weeks.
You need absolutely:
1- a good bag for your camera and lenses, the battery charger (+electricala dapater), the USB cable,...
2- a good quality SD card (eg Sandisk Extreme III 16 or 32 Gb), or better 2 good quality SD cards,
3- a hood.
4- a LCD screen protector.
The bag is the most important and it is best to go to your local store with your camera body and lenses. Most good stores will help you, as much as they can, to get the best equipment and you want a bag that is confortable to carry as well as to use in your travel. Bring your camera, your lenses, your accessories.... Try them in the bag, see how the weight is distributed when you carry it. Is it easy to access your equipment while you walk? while you shoot?
The SD card(s) is the next most important accessory (in my opinion). Go for quality (eg. Sandisk Exteme III). You do not want to loose your best shots because the card failed 2 days before the end of the trip..... You can buy it, online but check also with your local store.
The LCD screen protector can be very simple (I use a piece of transparent plastic), but will prevent any scratch on the LCD when you carry it around your neck.
In my travels, I take also with me a computer to backup my photos and post-process them rapidly. I do not use filters. I use a cheap LCD screen protector, on my camera LCD, to prevent scratches on the screen.
Before you travel, do not forget to get the latest firmware for your K-x and to install it.
Lastly neither kit lenses are outstanding in low-light conditions. Will you shoot in dark places, at sunset, sunrise, at night? Although the K-x is renown for good High-ISO photographs, I would recommend you to consider a large aperture lens (low f value) like a fast prime lense (eg 50mm f1.4) for dusk and dawn shooting. Take a small fast prime that you can fit easily in your jacket pocket.
Hope that the comment will help....