Code:
Set Head off
Set Feedback off
Set Trimspool on

Spool C:\Apps\Base\Count_In_Table.sql

Select 
  'Select Count(*) from '||Table_Name||';'
From
  DBA_TABLES
Where
  Owner  =  'SCHEMA_NAME'
;

Spool off

Set Head on
Set Feedback on

Spool C:\Apps\Logs\Count_In_Table.log

@C:\Apps\Base\Count_In_Table.sql

Spool off
Abhay.