Executing a trade: What is T-Cost and PV Pickup of Index Linked Gilt?

[love_lord_s]

Hi,

Suppose I buy an index-linked gilt. There will be some T-Cost and PV Pickup. PV pickup is basically Z-Spread*IR PV 01.

But, how do we interpret both of these terms? What do they mean exactly?

And, in what circumstances is T-cost different from zero?