I think the second piece is Redwood. I have planed a lot of old Redwood and it can look like your piece. Have fun with the planer and learn how to change blades. It comes with the fun. Mine has blades the can be sharpened by the local saw shop. He has seen them quite often!!
The last mystery wood i put through my planer turned out to be old Myrtlewood. It is being turned into a nice box. I gt a lot of rough wood locally and It is fun to see what is in there. I have complained to one guy about the figured wood he sold me when I wanted plain wood!! Didn't know until it was planed. He offered to take it back, but I kept it.