Identification: just started getting into plant care, have no idea what these are

hey so i got these plants from my sister (lol she keeps getting them from a friend for birthdays and christmas and doesn't take care of them so she gives them to me) id love to know how to take care of them, so if anyone could identify them for me that would be awesome.

 

#2 is a Dieffenbachia seguine cultivar. The key to these (and other Aroids) is soil that drains wicked-fast and pots with drainage holes. Other than drowning, they're nigh-on indestructable.

 

#1 looks to be Hedera helix. English ivy.

#3 is in sad shape. There are two common plants that come to mind: Plectranthus of some sort, and Kalanchoe, possibly Kalanchoe blossfeldiana. If it's Plectranthus spp., look for square stems. Either way it needs improved lighting and fast draining soil. Once it's ID is certain, you can prune it drastically to encourage better growth. The Swedish ivy/Plectranthus type would grow as a trailing plant, and a Kalanchoe would grow upright.