You can't. The only move tutor who teaches Seismic Toss is in FireRed and LeafGreen. Unless you had it there, then migrated it all the way up, your charizard can't learn it. But it shouldn't learn it, Charizard has better moves like Air Slash and Flamethrower. Teach it those. Not having Seismic Toss is not a loss to Charizard. Charizard is actually not that good with his Stealth Rock weakness though.
yes
no
You can't. Trade or link
dude! you need to trade!
Any Pokemon that can breed can breed with a ditto.
no
yes
no
You can't. Trade or link
dude! you need to trade!
............ its a starter, so you cant catch it.........
Any Pokemon that can breed can breed with a ditto.
get the TM and teach it to it
All you do is get one, then teach it to a Pokemon that is able to learn it.
Milotic, Empoleon or Vaporeon.
Inside Drayden's house, Iris will teach you Draco Meteor. In white, Drayden will teach you because you will be fighting iris in the gym.
You can capture the evolved form in Iccirus City, but the pre eveloved form is aftwr the city after the charizard bridge