You can recursively revert like this:
svn revert --recursive .
There is no way (without writing a creative script) to remove things that aren’t under source control. I think the closest you could do is to iterate over all of the files, use then grep the result of svn list, and if the grep fails, then delete it.
EDIT:
The solution for the creative script is here: Automatically remove Subversion unversioned files
So you could create a script that combines a revert with whichever answer in the linked question suits you best.