This stackoverflow answer has a good example of basic ajax posting.
https://stackoverflow.com/questions/5004233/jquery-ajax-post-example
I would try adjusting your code so that the info you want to post is in the data
parameter. jQuery isn’t my strongest suit, but I was under the impression that the $_POST data came through that parameter.
$('.walkthrough-list').find('a').each(function() {
$(this).click(function() {
data="p="+p_name+&uid='+user_meta.current_user_id+'&tut_name="+clicked_post;
$.post(
ajaxurl,
{
action: "rs-MYajaxAction",
data: data
},
function(resp) {
console.log(resp);
});// end $.post
return false;
});
Granted there is probably a much better way to serialize your data.