I have a killer Tamrac Express 7 Camera Bag model 3537 http://www.tamrac.com/welcome.htm, I got it brand new for 45 shipped. Perfect for what you have and walking around.
Some people get UV filters for their lenses, I do not...I do not think you can get one for the kits lenses, cause they do not allow screwing of filters on the front of them. you should be ok, just be careful. if you are really worried about the camera and lens you can get nikon armor, but just be careful and you should be ok.
Get the nikon wireless remote, http://www.bhphotovideo.com/c/product/207373-USA/Nikon_4730_ML_L3_Remote_Control_Transmitter.html
Also I would suggest getting a flash, amazing investment, I would either get the sb-400, good for most family shots and what not, if the budget allows get the sb-600, not quite as powerful as the sb-800, but the read out screen is way better then the sb-800. I am telling you a good flash is worth its weight in gold!!! If you do get a flash you will want a diffuser to go with it, they are cheap (clap)