I've never played that game & don't really care for football games, but in regards to your question:
1. Do you mean specifically how to play 1 season & 1 season only?
2. Just in general, how to play the game on your PC by using an emulator?
If the answer is 2., that is easy. Download the VICE emulator & the Football Director Game ROM (get it @ www.gamebase64.com). Install VICE, load the ROM/game, play away.
I hope that helps.
PS: I noticed there is also the game: "Football Director II"