You don't need a license to install ISE, but you need one to generate a bitstream. The WebPACK license is permanently free.
Yes, but with important clarifications. Xilinx/AMD does ISE 9.2 anymore. The software is considered legacy and is available for free under the terms of the Xilinx End-User License Agreement (EULA). However, you must be careful: Xilinx Ise 9.2 I Software Free Download
Visit the AMD/Xilinx licensing site to generate a legacy ISE WebPack license. You don't need a license to install ISE,
: Be cautious of "Free Download" sites offering "cracked" versions, as these often contain malware. as these often contain malware.