Terraforming could be a costly and lengthy process if the planet has anything like Venus' thick, sulfuric, CO2 atmosphere. If any water is present, it will most likely be within dense clouds. Though the possibility a hot, supercritical global ocean of water is not out of realm of possibility. Either way, drastic global cooling and reduction of atmospheric pressure would have to accomplished to make the planet even resemble Earth. Massive solar shades could help keep the planet cool from space, while high albedo cloud cover and buffer gases could keep the atmoshere at a comfortable temperature from the surface. Its surface gravity will be much stronger than Earth's, meaning only genetically engineered life forms and specially designed robotic drones could live pleasant lives there (one could predict that by the time interstellar travel is feasible, these technologies could easily exist).