You can be any level, but you need to be a member, and have completed the "Wolf Whistle" quest, that teaches you how to summon, no combat involved.
No you can only summon lv 7
No, you can only summon what is shown on the skill menu when you click the skill.
It depends on your combat lv.
the best level is about 139 now
By their Effects, you can Tribute the following monsters by themselves to Tribute Summon monsters above Lv.6 of the corresponding Attributes:Flame Ruler - FIRETrojan Horse - EARTHWhirlwind Prodigy - WINDFor examples, you can Tribute 1 Flame Ruler to Tribute Summon Firestorm Prominence (a FIRE monster, Lv.7), and you can Tribute 1 Trojan Horse to Tribute Summon Raging Earth (an EARTH monster, Lv.7).
Well, you look at what the monster's lv is (count the stars), then if it's a lv 5 or 6, then you need to send 1 monster from your side of the field to the graveyard to tribute summon it. If it's 7 or more, then it's 2 monsters. Some of them can't be tribute summoned at all, and need certain conditions to be summoned. Just remember that a tribute summon is a normal summon.
level 52 i think
get lv 99 on all stats that change combat except summoning which u need need to get to lv 95
Training it on Elementals Outside Falador
from abbsayl demons gotta be lv 85 slayer
Build an academy! The academy requires following: Headquarter lv 20 Market lv 10 and smith lv 20
if ur hunting lv is 100