Inner tire wear

I have a 1999 pontiac grand prix V-6 3.8L with 172,092 miles on it and aslo have 20"wheels on it I recently notice on the tires that the inner tire was getting worn pretty bad so I took it to get align for the first time in 2yrs but the mechanic told me that I needed to replace the outer tie rod ends and that would fix the problem is that true? Also my car makes a cracking noise everytime I come to a stop the noise will happen at accelaration and some times when im turning, the meachanic also told me that it was the hub berings accembly that I needed it is that true