1. level.
this basically easy. Since almost all monsters drop lv5 coins gems, so it's not hard do all event solo. ( take a bit to complete, but it's not impossible ) If you do all event alone in one day you can have lv60-70. The other way it's by boost, that mean, ask for help to another high lvl player, so that way you gain alot more EXP. Normally with boost you get lv80-90 ( depending also on he's/her lvl ).
Firts you should kill some mob till lv25, then you can run KJ ( knight's Jail ). There one time you haved reached lv30 you can run TOB/FD/DI. My recomendation. If you are doing it solo, start on TOB > FD > DI, and if someone are boosting you. Start at FD > DI > TOB. Remember TOB don't have boost mode. more close you are to the highest lvl in your party more EXP your going gain. Also FD ( Fallen Darkness ) - TOB ( Trial For The Brave ) - DI ( Dragon Island ).
One time you haved reashed lv90 you can farm in Olympost till lv101, then you can go GKW ( Giant kingdom West ).

2. Gears.
You can get gear on events.
you get lv45 SG from the starting red box. it's easy do lvl up, so you can go till lv90 with that gear. But If you want can do some others event that have chance to drop SG. lv60 SG from SI ( Specter Island ) lv75 SG from Gizza. and for lv90/115/120-ex30 at Siv NPC

3. NPC.
there a list of some NPC. location and what they do.
*Siv.
( 100, 200 ) She give you SG ( Soul Gear ) lv90/115 and 120 ex 30 non-primial. And can activate Exalt Status too, need be lv100 first.

*Klaud.
( 120, 236 ) One time you haved reached lv110 you can activate your cosmos here.

*Mina.
( 190, 223 ) Here you can upgrade all skills.

*Paidia.
( 185, 230 ) here you can learn the Exalted Skill. Can change Exalt EXP into Exalt Shard. ( used to boosts stats on gear ) . Also here you can buy Embed Gem, for Adorments .

*Dayana.
( 197, 200 ) Here you can combine all gems. Open Stardust Slot, Imbue Stardust / Starword, Merge Stardus, Purify Gear, Asteroid Transmute / Synthesis, and Ethereal Seal Combine / Convert.

*lokol.
( 199, 192 ) Here for Alter Talisman, Back Gear, Fashion, Chalise. Also for Upgrade Oracle/holy Items, and for Transfer SG.

*Johnny.
( 207, 192 ) Here you can Fortify Gear, Refine Soul jade, Reforge Gear, Ethernal Adomments, and Exchange Lv10 / 13 Chalice.

*Skuld.
( 254, 115 ) Here you can buy lv100 and lv115 skills. Can buy here items for damigod too, like Blood of Nemo & Pure Devil Fruit.

*Urd.
( 248, 114 ) Here you can change all the Hammer Scroll Into Hammer +7 to +15.

*Freate
( 213, 130 ) Here you can change all five word ( Anni - Ver - Sary - Cele - Bration ) into a Lucky Sticker.

*Natasha.
( 107, 94 ) Here you can Exchange Stone of SJ into a SJ ( depeniding on how many pack of Stone of sj you have, its the lvl of sj your going get.) Can Exchange ZEN Pack for Salary Cards here too.

*Kardanny.
( 112, 165 ) Here you can buy both compass ( Exalted Compass & Phasing Compass ), Forest Goddess Card ( need Starwish Charm for open this this card )

*LVL 9 Gem.
( 209, 167 ) Here you can Change Lv5 Gem Coin into a lv9 gem, any of you choice. Each lv9 cost ( 625 lv5 gem coin ) and for Gem of hel lv4 need (250 lv5 gem coin ).

*Ligg
( 159, 243 ) Here it's almost all about pets. You can Learn Skills, Fortify, Boost, Reicarnate, Unlock Skill Slot, Alter Skill Slot, and Remove Skill.

*Calleis.
( 153, 243 ) Here you can Appraisal, Retraining, Exalt and Sealing Pets, Also Learn & Forget Pet Exceed Skill.

*Billock.
( 147, 242 ) Here you can Fortify, Manufacture and Disassemble Pet Enhancements.

These following NPC are for IC ( Infinity Coin ) , BIC ( Bound-Infinity Coin ) OC ( Oracle Crystal ).

*Magestica. ( IC )
( 192, 154 ) Here you can buy almost all of Pet Skill ( ulti )

*Pet Skills. ( BIC )
( 198, 175 ) Here you can buy almost all of Pet Skill ( ulti )

*Immortal. ( IC )
( 192, 161 ) Here you can buy these pets, Flame kirin Egg ( Phys ) / Fire Kirin Egg ( INT ) and Valkyrie Egg ( Phys / INT ).

*Fashion Merchant. ( IC )
(218, 167 ) here you can buy fashion and back gear, for male and female. Odin's Blessing, Loki's Chaos, Hades' Outfit, Hades' Wing ( M ), Hades' Feather ( F ), Okula's Outfit, Okula's Feather.

*Item Merchant. ( IC )
( 219, 175 ) Here you can buy these items. Reis's Mysterious Medicine, Name-Change Elixer, Profound Core (x 200) / (x 1000)

* Item Merchant. ( BIC )
( 209, 176 ) Here you can buy these items. Reis's Mysterious Medicine, Name-Change Elixer, Profound Core (x 200) / (x 1000)