There are some definite differences between the PC version and the mobile version of the game. The coins are only available on the mobile version. The apparel bonuses earned won't transfer to the PC version (although from time to time there are glitches). The PC version has avatars that can be bought in the pro shop, but the avatars do not change the performance of the clubs; it only changes your golfer's appearance.
You can rent clubs on both platforms. The currency for the PC version is credits. You have to either win or earn them in competition, buy them, or there are surveys and videos that you can watch to earn free credits. You can rent clubs using coins or credits on the mobile platform, but if you hang around long enough you'll more than likely want to buy your own clubs. As you level up, the game gets harder and better balls and clubs will help you play better.
Joining a country club is a great way to meet players and make new friends. As you progress you will undoubtedly have questions and friends can shorten your learning curve a tremendous amount. Good luck.