Most? lol. You'd be surprised at just how versatile events really are. My friend, Xephyr evented a replica Guitar Hero game.... NO scripts whatsoever. He's better than me though lol.
Anyway.
The title screen is easy to change. It's in the database, under system. You can import your own picture for it. And the music you can import too, or just change to another of the rtp standard songs.
Next, Alchemy. This is actually one of my favorite things to do using events. And it might actually be simpler to do with events than scripts. You can add TONS of features and things to an alchemy system using events. I'll definitely start this as soon as I finish the pet system.
Weapon endurance... This could be a done easily with a script, I'm not going to lie. But it would also be very easy to do with events. However; without changing the default scripts, I don't know how to change the durability of the weapon during a basic "attack" but using skills, you can change the endurance, and then eventually break the weapon. However; it would be kind of a pain to break a weapon that is still fixable. But if you broke it for good, it would be pretty dang easy.
Horses, muchos easy. Just need the graphics of you riding a horse. A teleport spell is easy too. All you have to do is record the player's x and y coordinates. (I guess that would work more like a recall or hearthstone (WoW) that would send you back to where you set the spell at.)
Job class changing is simple. And a screen to do it is just as simple if you have any graphics design skills at all. I'm not sure what you mean by animations, but if you mean your character graphic, that's even simpler.
A HUD is a bit of a challenge because of how many different pictures you use. I made a multiplayer system once that used two players with 10 health and 10 energy each. This was easy to display on the screen, even though I had to make 40 different pictures. One for each amount of health and energy. There are a TON of HUD (hp and sp display) scripts out there that are very easy to use. And usually you can download a demo so you can see exactly how to install the script.
I'm not sure what you mean by learning skills from weapons. But I'm guess that when you're wielding a certain weapon, you have certain skills. That's probably one of the easiest ones yet.
Starting stats are pretty dang simple too.
So in essence. I will suggest getting a script for a HUD (heads up display.) That's all. Check out MOG's stuff. Do a search. I love his/her theme. And you might even grab a script for the title screen, menu, and shop too. They're all really pretty. (They aren't just windowskins either.)
Okay. One tutorial is done, but I have to ask some questions on it, because it is acting really wierd.