Things I need help with in my mod

So I thought it be a good idea to add here a list of parts I'm having a little bit of a hard time or done know yet in regards to my mod so anyone can help a little

First a forge, basically a fancy brewing stand with a few of its own recapies be even cooler if I could render stuff inside the block

Second a crafting table, so I want to make a fancy crafting table with a small invi inside I can figure something GUI stuff out like adding an input and output but that's all

Third my mobs, OK so I made my first mob (yeay me) and it turned out cute as hell but his hitbox it a little well not on him or bigger then the little guy is and I have no idea how to shrink it

Forth another mob thing, ID like to make my little guy plant saplings randomly in the world is that even possable? I'd also like (in time) to have items spawn a single villager like guy who will do a job (providing they have what they need) I figure I could use events maybe to brake stuff but I don't think they will collect and put in a chest without some codeing help

Fith trees, so I have a bunch of trees ready and waiting but indont know how to make them work properly, I would like to have the leafs decay and stuff like normal trees with having low % to drop saplings, about 1-2 saplings per tree sounds good lol

Sixth super codeing, OK this one will be less then no fun see I want to get RF and bubbles (I think that's the spelling) in the mod, I have things and amulets made and waiting, and I'd like some blocks to run on RF insted of coal, ID also like to make RF to in my mod

Sevenice(jez this list is long) multi blocks, well this one sucks lol I want to have some multi blocks going, why? Well because there cool that's why lol and I'm not sure if it counts as one but I'd like to have a windmill and water wheel to that will turn other power items like a grind stone for wheet into flower, I figure the stone will be easy, right click stone it will eat a wheet and give 2 flower or something but still any and all help would be nice

Finally ID like to thank anyone who actually makes itnto the end of this post and any and all help would be wonderful, who knows maybe I'll make a block in the game to give some credit to you

On a final note more stuff may be added as time goes on who knows I may end up getting more crazy ideas tomorrow lol