Are there any walking groups in Salzburg..guided ones are too expensive....groups who walk out voluntarily similar to Ramblers in the UK
Thanks
Treeca

If you mean for walking outside the city just buy a walking map, Austrian paths are very well waymarked and easy to do alone.

Buy or rent a dog or contact this http://www.bigboytravel.com/europe/austria/salzburg/freewalkingtour.

Hello!
If are staying outside the city, there are often in summer free walking tours which are organised from the local tourist office. But I have never heard from such an offer in the city of Salzbourg.
I this case I can only recommend you to contact the local tourist office of the city of Salzburg directly:
E-Mail: tourist@salzburg.info
Best regards
Isabella_W