I agree with Santander, "mucho gusto tacos!" sounds to me like "glad to meet you, tacos!"
"I like tacos" would be "me gusta los tacos" (literally, "tacos please me" or "tacos suit my taste", ; and I don't see how you can say it without a defiinite article), and "I like tacos a lot" would be "me gusta mucho los tacos."
As for other meanings, in Chile at least, "taco" is slang for both high heel and traffic jam. Not much Mexican food in Chile, and no one likes traffic jams, so outside of a shoe store, you're not likely to hear "glad to meet you, tacos!"
"Your swimming suit matches your eyes, you hold your nose before diving, loving you has made me bananas!"