delete the existing sharepoint farm it is a development machinie and re create again in same server

Hi

i want to 

delete the existing sharepoint farm it is a development machinie  and re create again in same server.

because i am facing issues to configure user profile service, 

the user profile syncronisation service starting and after some time its stopped.

while i am reading http://www.harbar.net/articles/sp2010ups.aspx

in current farm i given ip address for sql server while installing sharepoint

you have not used a Fully Qualified Domain Name or IP Address when specifying the SQL Server when running the SharePoint Configuration Wizard (PSConfig). Using either is strongly discouraged,

if i recreate the farm is it creates new databases in sql srver?

adil