1.  The following Collada Importer works somewhat, you can get the figure and skeleton into Blender but you'll have to do quite a bit of work to make the imported file practical for use.

teraapi.com/collada4blender/index.htm

2.  Blender has a 16 material per object limit. With that in mind you will want to import the figure and clothes as separate objects. Further you will likely have to consolidate material zones for each object to remain within this limit prior to exporting from Poser.