Opened game and Sims clothes and hair are all gone

If you have no cc active, all the clothing that is cc on these Sims were removed.

Were they supposed to have pack stuff ? Were they from the pack is said you didn't own ? Do those show owned now ? Did you save the game in that state ?

Sporty_Bookworm1​ 

Sporty_Bookworm1​ That looks like you have mods and CC disabled in Game Options.  If you haven't played since the last update, that explains why as mods and CC are almost always disabled when the update installs.  So, go to Game Options>Other and click the box to enable them.  Then restart the game.  When you get to the Main Menu, your sims will most likely look the same as they are in your pic.  Go ahead and hit Resume Game.  Once you get to the lot, check all the sims in your active household.  They should be dressed as they were the last time you played them.  You can also go to Manage Households and look at other households if you want to.  If everything looks ok, go ahead and play or do a save as and quit.  You might have save and reload the save several times before the Main Menu pic corrects itself.

If your sims continue to look like they do in your pic when you check them, then you must have saved with mods and CC disabled.  In that case, you'll have to redress every sim manually.  You'll also have to add all build/buy CC back on every lot where you used it as well.

Hope this helps.