Hi,
In cPanel, please click "Switch Theme" in the top-right, and go to "Switch to cPanel x3" to switch to the more advanced theme. (You can change back after.)
A lot of icons should appear; please click "Advanced DNS Editor". It will let you add all those records.
Be aware that when you're adding them, cPanel expects you to enter the full domain that the record will apply to. For the "@" symbol, that simply means the whole domain (so add that as "mydomain.x10host.com." instead for example).
MX Records cannot be added there - instead, please go back to the cPanel homepage, and then click the "MX Entry" icon to add it.
Let me know if you have any questions.