You've already answered your questions indirectly, to claim those tasks, you should have some TON on the wallet you're using which would serve as fees to claim the rewards, however incase you don't have that yet you could perform other tasks, I can see a task on that image that's yet to be claimed, just follow SIDUS HEROES on Twitter as instructed to claim about 300 SOON points. There's also some quests that could give you 2k and 1k points respectively you should do them too. So far I've been able to claim 10k plus points, getting closer to the 50k required points to enter season 3.