First, welcome to HBT!
Much (if not all) depends on how dedicated you are to brew your own beer, and the availability of needed ingredients. If you want to just try it to see if you like it, brew a few small batches on the stove in cooking pots you probably already have.
Regarding those brew equipment kits:
1) You don't really need 2 kettles. One larger kettle is generally more useful.
2) and 3) That's a 'Mr. Beer' kinda kit. Not really brewing, just dissolving premade canned extracts and sugar. Doesn't make good beer.
4) Most money is in the kettle and... the bench capper! For beginning brewers, that capper (~$50-60 in the US) is overkill, relatively expensive for what it is, while they tend to break (plastic parts under stress). An all metal wing capper (~$15 in the US, Morebeer.com) is all you need to cap bottles. I still have and use that one after 10 years. It can't break. Plastic ones are cheaper, I just don't like the feel of them.
That kettle seems to be made from fairly thin aluminum. It can be used, but if you're serious about brewing, go with stainless. How about a restaurant supply store, surplus, flea market, classifieds (e.g., Craigslist), etc.?
The choice of kettle is important when brewing and the size needed depends on what size batches and brewing method you want to do. You also need a suitable heating source. For example you can't boil 5 gallons (20 liter) on many kitchen stoves.
Most beginning brewers do partial boils using (unhopped) extracts, with or without steeping grains. A 4-5 gallon (15-20 liter) kettle is fine, so is probably a kettle found in a thrift shop, flea market, or "grandma's basement" that was used for canning. Then when those brewers get more advanced (after 2-20 brews), and want to do full volume boils or all grain they need a bigger kettle, certainly when 'brewing in a bag' (BIAB). So now there's another money outlay needed.
Have you read up on homebrewing? Do you have access to the ingredients needed?
There are 4 main kinds of brewing:
- Pre-hopped canned malt extracts, sugar, with perhaps some dry extract - Doesn't need to be boiled, just mix in warm water and chill. Does not make very good beer, while ingredients are way overpriced. The "illusion of brewing beer" is what sells those cans and ingredient kits. If you really like beer, buy it or brew better, real beer (options 2-4, below).
- Extract brewing - Boiling wort made from malt extracts with hops for 30-60 minutes. You can brew lots of good and excellent beer that way. Many styles can be brewed that way, but not all. The better recipes use some steeping grains for better flavor.
- Partial Mash - Like extract brewing, but a good % of the fermentables come from mashing (base) grains. This expands the types of beer that can be brewed. Since one needs to mash, most move on to 4 (below) sooner or later.
- All Grain - The sky's the limit beer style wise. Brew in a Bag (BIAB) is a very popular take on this, as everything is done in a large boil kettle. For 5 gallon batches a 10-15 gallon kettle is recommended. And an adequate heat source to boil that volume. You also need a chiller, although no-chill is a really viable option if water is scarce.
You can ferment in a large plastic (food grade) bucket with a well closing lid, no need for fancy "fermenters." Buckets are easy to clean too. Bonus: They come with a built in handle!
Read up around these forums for ideas and practical applications that may suit your style and setup. The more you know...
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