The only cable you need is an ethernet cable - to configure the router to your laptop.
I can't remember if it's included in the router - I can't remember buying one.
It is very easy to set up PROVIDED you follow the instructions exactly.
Linksys provides a 'netset assistant' that makes it easy.
I can honestly say that I change my router settings every two months (I am a security conscious freak) and have had no problems wither with configuration or loss of signal strength.
My router is in the loft, I can connect everywhere in the house and at the bottom of the garden.
And I am a total techie numptie.