The official Tomb Raider YouTube account has published some footage of the pre-alpha version of the original Tomb Raider. This comes by way of fansite Planet Lara.
In the video the familiar character model for Lara Croft walks around what would eventually become the Vilcabamba level. Her braid and sunglasses are featured for this character model, and the player can freely zoom in an our with the camera.
Animals are present though do not attack, and Lara’s jump is much larger than what ended up in the game. You can check out about two minutes of the early gameplay in the video below.