It's Timo 
Your MCP2515_can board uses SPI for communication and PC does not have any SPI board. Either you USB-TTL cable does not help, since there is no sw handling that communication from PC. There are some options.
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Buy Actisense NGT-1 USB. This is the easiest, but expensive (180 € ?)
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Buy Arduino Mega board and wire your MCP2515_can board to that. Then use ActisenseListener example under my NMEA2000 library examples. Note that your board is made by Niren and it has 8 Mhz clock instead of default 16 MHz, so you have to set that for example.
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I prefer to by Teensy 3.2 and MCP2562 chip or "Teensy CAN-Bus Breakout Board Include Teensy 3.2". It is much more powerfull than Mega and so more usefull, if you decide to make some own devices to bus. With Teensy you also use ActisenseListener example.