check out these.............

for me
yes you need to

You don't need to be talented, if you are good at sketching comic creators require alot of manpower to do sketching on his sketches, all you do is follow the lines and touch up. You don't really need to know how to draw but need to be skillful. Of course if you talk about creating manga on your own that requires alot of talent, as even famous creators even if they are good at drawing they still need a good script writer to create interesting & beautiful works, unless you are like Akira Toriyama & few others that draw & write their own scripts. Even the original Gundam have different personnel doing the mech design, character design, drawing, sketching, screen writing, painting etc. Doing comic instead of cartoon or 3D games doesn't mean it's cake walk 1 person can handle. It usually takes a year or more for a one man team to come up with 1 volume while 3-4 months of a full team.