if your using 2005
then
select 'drop table '+table_schema+'.'+table_name from information_schema
select 'drop procedure '+routine_schema+'.'+routine_name from information_schema.ROUTINES
where ROUTINE_TYPE ='procedure'
this will generate drop script.
or open SSMS open database and select tables folder and press f7 key select all user table press del button 🙂
similarly procedures