Gibberish output from an ESP8622 WiFi module
You have two problems

1) The output you see (ets Jan 8 2013,rst cause:2, boot mode:(3,6)) is printed by the startup (bootloader) code. After that, the communication continues on a different baudrate (IIRC either 9600 or 115200 baud, depending on the firmware revision).

2) The 3.3V output of an FT232 can't deliver the current required by an ESP8266: not by a wide margin. Use a separate 3.3V supply. Probably the ESP8266 crashes due to too low voltage during or right after startup.