Simple answer is Both. A 50mm prime lens can be had new for about $130, so I would pick it up in addition to the kit if its within your budget. The kit lens 18-55mm will be more useful if I had to choose. Wide angle shots are pretty great when used properly. You wont have to stand 30' away to take group picture for example. The kit 18-55mm can also be had pretty cheap used since people tend to sell them when they upgrade. An alternative could be to buy a new DSLR body, used 50mm and used 18-55mm and still stay within your budget. Just go to reputable local camera shop. They usually have a six month warranty on used lenses. eBay is OK, but it's hit or miss since most no longer have any sort of warranty. B&H sells used equipment also. Nothing wrong with going the used equipment route when it comes to photography. Just about every pro that I know of has bought used gear at one point.

I think I will get the kit. I've been reading about the settings and such. I plan to take photos early or late in the day, or maybe on a cloudy day. Do I need a polarized filter? Which filter do you recommend?

I have a Pentax K-R in White.I paid $510 for a full bundle(Lens[18-55mm],carry bag,memory card,and obviously body).The price for the lenses and other lens hoods,filters,and etc. are not too bad either.I wanted to choose a different kind of DSLR rather than Nikon or Canon.Everyone I know has a Nikon or Canon(and don't get me wrong,they're nice)but, I wanted to find something cheaper and better.I looked at reviews and based on personal experience at my local Camera boutique with it and i'm happy with my choice.My friend has a Nikon D3000 and another has T2 and they both like how my Pentax shoots and the features it has. Def don't be afraid of branching out.I hope you find something you really like man!

i think at entry-level it's more of the shooter's inexperience that gives crappy shots.

oh wait, why the hell am i writing an autobiography? :D