Hi etvaaa and welcome to the RH Forums.
This sounds like you need to use the min-TOC feature. If you position the cursor at the top of a topic, click Insert > Placeholder > Mini TOC you'll get a dialog that allows you to specify styles to add to the top of the topic. When they are added, they automatically link to the relevant style.
Welcome to Robohelp Forums.
You can use the Hyperlink Feature and link a bookmark, please follow these instructions :
1) Place your cursor at the Destination Point and insert a Bookmark :
2) Give a name to that Bookmark :
3) Select that Text on which the user will click (Right Click -> Insert Hyperlink)
4) Select that Bookmark which you inserted a while ago
Hope it helps !!