the seller is trying to oversell, don't buy any filters. However, if you're worried that you might damage your lens by scratching it or dropping the camera, a cheap UV filter might help; usually costs 2-3 bucks. But be aware that cheap UV filter will degrade picture quality (unclear picture, ghosting when shooting with indoor lighting or in direct sun/moonlight, etc). If you take good care of camera and handle it well, you don't need a UV filter to protect the lens.
Bottomline, don't waste money on filters. A set of good UV, polarizing, and ND filter will cost you roughly the price you paid for your camera itself. Anything cheap is crap. Just tell your seller that you are not interested in any filters for now and will contact them if you need some later.

Kittys, yes you can get filters that'll give reddish/greenish, etc tint to your pictures but, like I said above, good ones are expensive and cheap ones will degrade picture quality. On top of that, most cameras can do that without using any filters - you need to play with the white balance settings and also color modes. If you're still not satisfied with the in-camera settings, you cal always post-process the pictures using photoshop or similar softwares.