A Siberian Husky jumps through a time portal, technically rendering it dead for a brief moment due to the rapid passage of time. Recovers upon exiting the portal.
While technically not a “ghost” per se, Lara does see a vision of her deceased father for about a minute and has a conversation with him in the 3rd Act. It’s a touching scene and not scary at all.
A large piece of metal in a stomach gets pulled out, then later stitched up, honestly not at all that bad unless you're really squeamish or put off by stomach injuries.
In the manor, two commandos suspended from the ceiling fall to the floor after their ropes are cut by Lara. A third one is picked up by her on a bungee cord and dropped from a similar height.
In Cambodia, one or two henchmen are thrown into a deep pit by animated stone statues.