@Gigiloves2play When the EA Access ends, the access to the game will also end. You either need to subscribe to EA Access, or purchase Sims 4 after the subscription ends to continue to play Sims 4 or any other EA Access game.
You can purchase Cats and Dogs bundled in the Microsoft Store on the XBox with My First Pets. This bundle is the Cats and Dogs Expansion, with the My first pets included free.
Console does get sales, and it's probably best to wait for them, otherwise the price is very high for all the packs.
As for how to change the hair style and skin, you can do this from the manage households screen before you enter the game. The button for households is at the top right of the screen before you select a world to enter and play. You can then edit the Sim any way you want. For Skin and hair and eyes, you have to click on the head to zoom in and open the head options.
You can also do this while in the game playing by having a sim select "Change Sim" on a dresser or mirror.
