Check ( zoom in) December 2013 -2014 chart to answer your question

BTC was the first. Since its release in 2009, it's become the most famous, established and valuable cryptocurrency. But it's not the only game in town.
Litecoin followed in 2011.
Created by Charles Lee, an engineer who later helped build Coinbase, the leading cryptocurrency exchange, Litecoin is based on the same code as Bitcoin but with a few tweaks designed to address two of its predecessor's limitations: transaction speed and access to the mining process.  
Litecoin offers its own advantages. Its creator is a known and active entity in the cryptocurrency community.
It has a capacity for faster transactions -- a potential advantage in and of itself, which also provides for a different set of use cases than Bitcoin. And it still offers the potential for profitable mining, unlike Bitcoin.

Yeah LTC is more than undervalued and I hold it not only  for sentimental reasons. But what rank did he get from Weiss ratings?

If mining with your own hardware is not an option, buying is the only way to get them, yes.

LTC is surging very high in Koinex exchange in India since 6 P.M.. but I have not seen the same surge in any other exchanges so far, guys any idea?

I am a strong believer in litecoin and it will rise significantly there will be new news coming in the next few days or so don't say I haven't warned you all don't sell Hodl for now and you will reap awards

Compared to the BTC price it was pretty steady if you look in the statistics. It's just the BTC price was pretty high, and when it went down other altcoins will fall too (btc amount will be stable) just the worth of it in $/€ will fall.

As you probably know, the best mining pool for Litecoin is https://www.litecoinpool.org/ . However, GPU mining it is not proffitable anymore and you cannot compete with ASIC miners, but you may give it a shot on Nicehas or Prohashing. Here are the links: https://www.nicehash.com/ and https://prohashing.com/ ! If you have enough money you can invest in an ASIC Antminer L3, is about $3800 on Amazon, or you can invest directly in LTC, by buying it! It's up to you

Litecoin is priced good right now, and the news of a Lightning Network (LN) with LTC being interoperable with the BTC Lightning Network, could solve a lot of problems for the Bitcoin and Litecoin teams together. I look for the price to increase dramatically once both lightning networks are up and running.