Make the title and […] clickable in result search

As for the_title(), you can wrap your title in anchor tag, use get_permalink() to get the path to the single post. Something like this will do

the_title( '<h1 class="entry-title"><a href="' . esc_url( get_permalink() ) . '" rel="bookmark">', '</a></h1>' );

For any info on how to modify/style the_excerpt(), check out this post I have recently done. Everything you want to know should be in that post