Are they still tasty? I've heard spices lose taste over time. I did a small taste of one vial, and they still had a taste
Spices do age but not nearly as fast as internet recipe stealers will want you to believe. This is for most people, if you are an actual hypertaster you may notice a difference week by week for all I know I have only met 1 actual hypertaster in my life (shockingly it was a man. most aren't)
The only way to know is to try them out. You may have to add more than when they were fresh but if you cook things how you like them then it is "to taste" anyway.
When you see a "food blogger" AKA recipe thief ("My grandmother invented this recipe for Pop Rocks casserole during the depression when popping candy was all that was left in her pantry.."), who tells you something will be good in the freezer for "up to a month", spices are only good for 3 months, you should throw Fleur de sel/Maldon sea salt in your pancake batter, you should de-ice your driveway with Himalayan pink salt or Hawaiian black salt, etc punch them in the junk. All they are doing is trying to get you to waste expensive ingredients to make themselves seem more refined than you or more like an expert.
Spices do deteriorate over time, ground faster than whole but I have some ~20 year old tika Masala spice that I still plan to use when I can find some camel meat.
For your tandoori chicken go get a terra-cotta flower pot that will fit your chicken and a terra-cotta saucer to flip it over on instead of buying a tandoor. Should run you ~10$ instead of ~150$ in white people money.
For the tikka Masala grab a few cans of coconut cream if you do not already have a pile for curry. Dump one in a pan with spice to taste. Grill up chicken, cube and pitch it in, then simmer for 5-10 min. You can throw it on rice or eat it right out of the pot if no one is watching. For left over cans of coconut cream grab some big plastic containers of Mae Ploy curry paste from the Asian grocery and make plenty of curry. Pretty much anything will curry.
If you make ghee with unsalted butter, you can save the brown nutty solids and pitch them in your next batch of burgers. If you use salted.. the burgers may get salty.