1 - some type of zoanthid. Easy coral to keep, no feeding necessary. Just sit back and watch them spread! They do well in any type of light and flow, but generally should be placed in the bottom to middle of the tank.
2 - this looks to be a sponge. Sponges are considered expert-only animals. This may prove very challenging to keep in a new tank, as they are filter feeders (non-photosynthetic) and require dissolved material in the water to survive. Your best bet may be to dose liquid plankton in the tank, although I'd hate to tell someone with a new tank to do that, as it can easily ruin your water quality. Sometimes sponges do just fine if left on their own, without any feeding, but that's usually in mature, established tanks that naturally produce their own food in the water column. Also, sponges should never be exposed to the air, as air bubbles will get trapped in their tissue and slowly kill them off. This includes being taken in and out of the tank for transport -- anytime they are moved, it must be completely done underwater. They require higher flow levels, and lighting doesn't matter since they are non-photosynthetic.
3 - palythoa, or button polyps. Very similar to #1. No special care required, very easy to keep.
4 - xenia. Another good choice for a new tank. Easy coral to keep, and spreads quickly (sometimes too quickly, and it can become a best). It also requires no special feeding. Low to medium light, low to medium flow.
