Error on apache2 installation

The problem does not seem to be in the error you describe. More probably it is caused by the fact, that port 80 is already in use.

dic 30 20:23:49 xxx-laptop apachectl[31755]: (98)Address already in use: AH00072: make_sock: could not bind to address [::]:80
dic 30 20:23:49 xxx-laptop apachectl[31755]: (98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:80

Check what uses the port and stop it, that should help.

To check what uses the port, you can use netstat -tulpn | grep 80

Example output -

root@server:~# netstat -tulpn | grep 80
tcp6       0      0 :::80                   :::*                    LISTEN      761/apache2

So in my case, the port is taken by apache.