ALmsot all cars have water coming out the exhasut.. especially people who only drive short distances.. Youll find it alot on peoples car who do shorts trips to school or the shops etc...

Providing its not chucking out steam ( head gasket failure usally ) then your all good

as for your lumpy idle, u might need your ICV ( idle control valve ) cleaning.. ( under air intake ) or you might have an air leak for it to idle rough