load certain content only on first page of pagination

At a quick glance, it looks like this is nothing to do with your use of is_paged() (which looks correct) but that your closing if and endforeach statements are the wrong way round? You need to close the foreach() before you close the if().

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)