There are Shop Tokens, there are Hourglass, there are Tickets and there are Emblems - it's all there, but as far as I can tell, you can only buy one of these, and while it's technically possible, it's not exactly front and centre in the interface
The permanent remains able to attack and tap to play abilities until it changes controllers or leaves play
Sarkhan, Dragon Ascendant Sarkhan, Dragon Ascendant is a non-planeswalker form of Sarkhan and is therefore commander eligible
This has a 67% chance of being uncommon, a 26.4% chance of bring rare, and a 6.6% chance of being mythic
Inti, Seneschal of the Sun : Allows you to Discover 3 when it comes into play, so exile cards from the top of your library until you hit a non-land card of mana value 3 or less, then cast it without paying its cost, or put it in your hand
In the future, we can expect to see more single-turn Auras and red cards that work with them (though probably not until another set where Auras or enchantments matter again)