This is how you can play toca race driver 3 (it works for toca race driver 2 and pro race driver as well), on LAN (network multiplayer) on your pc.
What you should do:
Go to Simulation Mode in your game and then to Network, click F1 to create a server for your team mate to join in.
What your mate should do:
Go to Simulation Mode in your game and after the server has been successfully created, refresh the server list, you should find your mate's server there.
If you can't find your team mate server. Just make sure that your network is selected as a Home Network, and you both are joined in the same Homegroup. You can see a tutorial by clicking on here!