If I conquer and move out of Targon's Peak, can I ready 2 runes still?

Yes, you can still ready 2 runes.

According to the established rules for triggered abilities and specifically RiftJudge FAQ #9525, triggered abilities are independent of their source once they have triggered and been placed on the chain.

Why this works:

1. Triggering: When you conquer the battlefield, the ability ("When you conquer here...") triggers. At that moment, the condition is met and the effect is placed on the chain.
2. Independence: Once the ability has triggered and created its delayed effect, it no longer requires the source (Targon's Peak) to remain in play or for you to still be in control of it.
3. Resolution: The delayed effect is scheduled to occur at the end of the turn regardless of whether you have since moved your units out or lost control of that battlefield.

As long as you successfully conquered the battlefield at some point during your turn, the delayed trigger will activate at the end of your turn, allowing you to choose up to 2 runes to ready.