The TDS1000 required an option communications module to communicate to a PC. All of these modules are no longer available for sale. If you have a module for the scope please reference the programmers manual for additional details.
Modules:
TDS2CM or TDS2CMA, any version, when used in TDS1000 or TDS2000 Series instruments, any version.
TDS2MEM any version, when used in most TDS1000 or TDS2000 Series instruments (except TDS1001 and TDS2004 models), any version.