Look at the underside of one of the pieces to see who made it and if it is sterling. Sterling is much more valuable than silver plate. I have identified some old silver by describing searching on Google images. Some patterns are in more demand than others, so it is impossible for me to tell you how much your silver is worth.
You can research your silver in this book:
"Silver: A Practical Guide to Collecting Silverware and Identifying Hallmarks" by Joel Langford
If your pieces are plated:
"Silverplated Flatware: An Identification and Value Guide, 4th Revised Edition" by Tere Hagan. This will help more with identification, but as it was printed in 2008, it will not reflect current values.
Once you identify your flatware, you can search values at Kovels, Replacements, or Worthpoint online.