Could you paste the contents of the file? It might have accidentally been modified.

Can you please explain a little more I'm new to this.

Well, you need to provide more information about what you were doing when the error occurred.
Also, since it's a file related to repositories, what other repositories did you add or you tried to add.

The error is quite clear: there is an error on line 2 of "/etc/apt/sources.list". Hence, a copy of that file's content would be helpful.
My "/etc/apt/sources.list" looks like this:

deb cdrom:[Debian GNU/Linux 2016.1 Kali-rolling - Official Snapshot amd64 LIVE/INSTALL Binary 20160830-11:29]/ kali-rolling contrib main non-free

#deb cdrom:[Debian GNU/Linux 2016.1 Kali-rolling - Official Snapshot amd64 LIVE/INSTALL Binary 20160830-11:29]/ kali-rolling contrib main non-free

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

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

#deb http://security.debian.org/debian-security wheezy/updates main

The lines that start with "#", are comments, so they are ignored.

root@kali:~# cat /etc/os-release
PRETTY_NAME="Kali GNU/Linux Rolling"
NAME="Kali GNU/Linux"
ID=kali
VERSION="2019.4"
VERSION_ID="2019.4"
VERSION_CODENAME="kali-rolling"
ID_LIKE=debian
ANSI_COLOR="1;31"
HOME_URL="https://www.kali.org/"
SUPPORT_URL="https://forums.kali.org/"
BUG_REPORT_URL="https://bugs.kali.org/"
root@kali:~# nano /etc/apt/sources.list
root@kali:~# nano /etc/apt/sources.list
root@kali:~# apt update
E: Malformed line 2 in source list /etc/apt/sources.list (type)
E: The list of sources could not be read.
root@kali:~#

i was trying to add mana toolkit

i cannot run apt update as it just comes up with that error message.
E: Malformed line 2 in source list /etc/apt/sources.list (type)
E: The list of sources could not be read.

/etc/apt/sources.list: Permission denied

Could you try pasting this as root (all 3 lines)?

cat <<EOF>/etc/apt/sources.list
deb http://http.kali.org/kali kali-rolling main non-free contrib
EOF

It's from https://www.kali.org/releases/kali-linux-2019-3-release/ (the section titled "Ensuring your Installation is Updated") and it should reset your /etc/apt/sources.list to sane defaults. If you have modified it, you could back it up first.

Obsolete major version 11
│
│ The PostgreSQL version 11 is obsolete, but the server or client packages
│ are still installed. Please install the latest packages (postgresql-12
│ and postgresql-client-12) and upgrade the existing clusters with
│ pg_upgradecluster (see manpage).
│
│ Please be aware that the installation of postgresql-12 will
│ automatically create a default cluster 12/main. If you want to upgrade
│ the 11/main cluster, you need to remove the already existing 12 cluster
│ (pg_dropcluster --stop 12 main, see manpage for details).
│
│ The old server and client packages are no longer supported. After the
│
│ <Ok>

running the install update and it says this?

This is a bug tracker, not a support forum. Please seek help on forums.kali.org instead.