Offizieller Kommentar
Hi Lukas,
To solve your first problem, enable the Auto Cue feature by holding down the Time/Auto Cue 'button' on the screen.

Needle search will only work when a track is paused. You can pause a track by pressing the play/pause button or touching the jog wheel while in vinyl mode.
Be sure to read your entire user manual thoroughly in order to get the most out of your XDJ-700's