You need 4450 to get to low kerbin orbit, then 1030 to get an Eve intercept under perfect conditions, but more like 1400 though if you have to do a mid-course plane change. If you are willing to aerobrake into eve orbit, then that's basically all you need, but if you want to keep it realistic and do a powered orbit capture, you need an additional 1310 for that. All numbers are delta-v requirements in meters per second. Use mechjeb or kerbal engineer to measure delta-v, and you can use mechjeb for aerobraking predictions too. Or you can just use trial+error with quicksave. A very small probe with an ion engine and a one xenon tank is a nice choice for eve because it will have 4000 to 5500 m/s of delta-v depending on weight, you only need about half the solar panels at eve (compared to kerbin) to run the engine at full power, and you can even take it to Gilly and land it.