You can loosely tie the ends together and keep knitting. Later you can either reknot the end tighter and hide them, or weave them in. The Tips page has some other ideas for Joining Yarn.
Fringe is usually put on with a crochet hook - poke it through a st on the end, fold the strand in half and bring the loop through the st and then the ends of the strand through the loop and tighten. There may even be a video for this on Youtube.