In Yosemite, the Finder finally allows Batch Rename of files by control-clicking on a set of files.
However, the options are fairly limited and their is no preview at all. The end of the TidBITS article and the comments list various third party applications, but I've been using this macro for quite a while and it works well.
It prompts for the search and replace formats, and then asks for each file whether you wish to rename to a specific new name. You can click "Rename All" once you're satisfied your replacement is correct.
There are no options for adding an index or a date, but allowing regular expressions lets you do a fair number of things, and if an index or date was important to you it would not be hard to add a step to the macro that replaced some resulting fixed string with an index or a date.
Rename Files.kmmacros (7.8 KB)