Hi I'm new to magic and was wondering if death touch kills planes walkers no matter how many counters they have
No, it will not.
702.2b (http://imtgapp.com/forum/index.php?action=imtg;area=rule;number=702.2b): Any nonzero amount of combat damage assigned to a creature by a source with deathtouch is considered to be lethal damage, regardless of that creature's toughness. See rules 510.1c-d.
Deathtouch only really matters if it's dealing combat damage to a creature. And welcome to Magic! And this forum :)
Welcome to iMTG! Always good to find new players as well.
If you need any other assistance, the people here are very helpful.