it sounds as if you have the basics- straight pins, a 6" x 24" rotory cutting ruler- and a square ruler (the ones i would be lost without are 12 1/2" square & 6 1/2" square- i've been at this for a few years and have picked up many other rulers ect over time- but you do not need them all at once.
choose a beginner friendly pattern you love & want to start with & see what notions/supplies it calls for & jump in- as you (spread your wings) you will accumalate more supplies-
i don't know that you should spend money on any templates unless you are working on a specific project that requires any- there are literally thousands of different ones- and *generally* project dependant. oh- good scissors too- scissors, rotory cutter/mat/ruler, pins, machine, thread, pattern & fabric & you are on your way!
