How many repos are supposed to be in sources.list ?

[Vulpi]

As a minimum:

deb http://http.kali.org/kali kali main non-free contrib
deb http://security.kali.org/kali-security kali/updates main contrib non-free

Save and update.

If you have a particular need, you can add -src, -dev, and also unsupported PPA's etc (at your own risk).

My sources.list:

# deb cdrom:[Debian GNU/Linux 7.0 _Kali_ - Official Snapshot amd64 LIVE/INSTALL Binary 20130327-17:54]/ kali contrib main non-free

deb http://http.kali.org/kali kali main non-free contrib
deb-src http://http.kali.org/kali kali main non-free contrib

deb http://http.kali.org/kali kali-dev main contrib non-free
deb-src http://http.kali.org/kali kali-dev main contrib non-free

deb http://security.kali.org/kali-security kali/updates main contrib non-free
deb-src http://security.kali.org/kali-security kali/updates main contrib non-free